General Chemistry 11th Edition Ebbing Test Bank 1

Chapter 05 - The Gaseous State
General Chemistry 11th Edition by Ebbing

Gammon ISBN 1305580346 9781305580343
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1. Which of the following concerning a barometer or manometer is/are true?

1. Pressure is directly proportional to the height of the liquid used in the device.
2. Pressure is directly proportional to the density of the liquid used in the device.
3. Pressure is independent of the acceleration of gravity.
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2
e. 1, 2, and 3
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: False
LEARNING OBJECTIVES: GENE.EBBI.13.133 - Convert units of pressure. (Example 5.1)
TOPICS: phases
gas
2. It is possible to make a barometer using a liquid other than mercury. What would be the height (in meters) of
a column of dichloromethane at a pressure of 0.830 atm, given that 0.830 atm is equal to a 0.63522 m column of
mercury and the densities of mercury and dichloromethane are 13.5 g/cm3 and 1.33 g/cm3, respectively.
a. 6.4641 m
b. 0.156 m
c. 0.0621 m
d. 0.838 m
Copyright Cengage Learning. Powered by Cognero. Page 1
e. 1.19 m
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
3. A particular gas exerts a pressure of 689 mmHg. What is this pressure in units of bar?
a. 5.17 × 105 bar
b. 5.31 × 105 bar
c. 698 bar
d. 0.894 bar
e. 0.918 bar
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
KEYWORDS: gas pressure
OTHER: general chemistry
4. A particular gas exerts a pressure of 731 mmHg. What is this pressure in units of atmospheres?
a. 5.48 × 105 atm
b. 5.63 × 105 atm
c. 721 atm
d. 0.974 atm
e. 0.961 atm
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True

TOPICS: phases
gas
5. A particular gas exerts a pressure of 2.52 bar. What is this pressure in units of pascals?
a. 2.49 × 105 Pa
b. 2.52 × 10–5 Pa
c. 2.52 × 105 Pa
d. 2.55 × 105 Pa
e. 2.49 × 10–5 Pa
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
6. A particular gas exerts a pressure of 4.33 bar. What is this pressure in units of atmospheres?
a. 4.38 atm
b. 3.25 × 103 atm
c. 3.33 × 103 atm
d. 4.27 atm
e. 4.33 atm
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
7. A particular gas exerts a pressure of 2.42 atm. What is this pressure in units of mmHg?
a. 2.38 mmHg
b. 1.84 × 103 mmHg
c. 2.45 mmHg
d. 3.18 × 10–3 mmHg
e. 1.86 × 103 mmHg
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
8. A particular gas exerts a pressure of 4.02 atm. What is this pressure in units of bar?
a. 3.06 × 103 bar
b. 4.02 × 105 bar
c. 4.07 bar
d. 3.96 bar
e. 5.29 × 10–3 bar
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
9. A particular gas exerts a pressure of 5.56 × 104 Pa. What is this pressure in units of bar?
a. 5.56 × 109 bar
b. 0.556 bar
c. 73.1 bar
d. 5.49 ×104 bar
e. 5.63 × 104 bar
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
10. A particular gas exerts a pressure of 4.09 × 104 Pa. What is this pressure in units of atmospheres?
a. 0.403 atm
b. 4.04 × 109 atm
c. 0.414 atm
d. 0.409 atm
e. 4.14 × 109 atm
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
phases
11. The pressure of a certain gas is measured to be 264.6 mmHg. What is this pressure expressed in units of
pascals?
a. 3.436 × 10–6 Pa
b. 2.91 × 105 Pa
c. 2.835 × 10–5 Pa
d. 2.681 × 107 Pa
e. 3.528 × 104 Pa
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1

HAS VARIABLES: True
TOPICS: phases
gas
12. The pressure of a certain gas is measured to be 4.304 × 103 Pa. What is this pressure expressed in units of mmHg?
a. 5.589 × 10–5 mmHg
b. 3.271 × 106 mmHg
c. 3.098 × 10–2 mmHg
d. 32.28 mmHg
e. 1.789 × 104 mmHg
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.1
HAS VARIABLES: True
TOPICS: phases
gas
13. A flexible vessel contains 43 L of gas where the pressure is 1.3 atm. What will the volume be when the
pressure is 0.61 atm, the temperature remaining constant?
a. 0.011 L
b. 20 L
c. 43 L
d. 0.044 L
e. 92 L
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.134 - Use Boyle's law. (Example 5.2)
TOPICS: phases
gas
KEYWORDS: Boyle's law | empirical gas laws
14. A flexible vessel contains 78.00 L of gas at a pressure of 1.50 atm. Under conditions of constant
temperature and moles of gas, what is the pressure of the gas when the volume of the vessel is tripled?
a. 0.572 atm
b. 4.5111 atm
c. 2.38 atm
d. 1.5 atm
e. 0.025578 atm
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
15. A flexible vessel is filled to a certain pressure with 28.00 L of gas. Under conditions of constant temperature
and moles of gas, how does the pressure of the gas change when the volume of the gas is tripled?
a. The pressure decreases by a factor of three.
b. The pressure increases by a factor of two.
c. The pressure remains the same.
d. The pressure decreases by a factor of two.
e. The pressure decreases by a factor of four.
ANSWER: a
POINTS: 1
DIFFICULTY: moderate
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
16. A flexible vessel contains 37 L of gas where the pressure is 1.0 atm. What will the volume be when the
pressure is 0.70 atm, the temperature remaining constant?
a. 0.019 L
b. 26 L
c. 37 L
d. 0.046 L
e. 53 L
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
17. A 2.00-L glass soda bottle filled only with air is tightly capped at 25°C and 728.0 mmHg. If the bottle is
placed in water at 65°C, what is the pressure in the bottle?
a. 280 mmHg
b. 826 mmHg
c. 1890 mmHg
d. 642 mmHg
e. 324 mmHg
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
18. A sample of methane, CH4, occupies a volume of 318.0 mL at 25°C and exerts a pressure of 1010.0 mmHg.
If the volume of the gas is allowed to expand to 770.0 mL at 298 K, what will be the pressure of the gas?
a. 2440 mmHg
b. 4970 mmHg
c. 417.1 mmHg
d. 0.01727 mmHg
e. 452 mmHg
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True

TOPICS: phases
gas
19. When the valve between the 2.00-L bulb, in which the gas pressure is 2.50 atm, and the 3.00-L bulb, in
which the gas pressure is 1.50 atm, is opened, what will be the final pressure in the two bulbs? Assume the
temperature remains constant.
a. 1.90 atm
b. 4.00 atm
c. 2.17 atm
d. 2.10 atm
e. 1.83 atm
ANSWER: a
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
20. Absolute zero is the point at which

a. a straight-line graph of V versus T (°C) intersects the origin.
b. a straight-line graph of 1/V versus P at constant T intersects the origin.
c. gaseous helium liquefies.
d. a straight-line graph of V versus 1/P at constant T intersects the origin.
e. a straight-line graph of V versus T (K) intersects the origin.
ANSWER: e
POINTS: 1
REFERENCES: 5.2
LEARNING OBJECTIVES: GENE.EBBI.13.135 - Express Charles's law in words and as an equation.
TOPICS: phases
gas
KEYWORDS: Charles's law | empirical gas laws
21. The following volume-temperature plots were made at different values of constant pressure while the
number of moles of gas in each experiment remained the same. Which plot represents measurements at the
highest pressure?
a. B
b. C
c. A
d. They are all at the same pressure.
e. D
ANSWER: c
POINTS: 1
REFERENCES: 5.2
TOPICS: phases
gas
22. Which of the following is a correct statement of Charles’s law, ?

a. The volume of a gas varies proportionally with the pressure.
b. The volume of a gas sample varies directly with the absolute temperature.
c. All gas samples of the same volume at STP contain the same number of atoms.
d. The pressure of a gas sample varies inversely with the volume.
e. All gas samples of the same volume at STP contain the same number of molecules.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
TOPICS: phases
gas
23. The volume of a sample of gas measured at 35.0°C and 1.00 atm pressure is 2.00 L. What must the final
temperature be in order for the gas to have a final volume of 3.00 L at 1.00 atm pressure?
a. 189.0°C
b. 52.5°C
c. –220.5°C
d. 23.3°C
e. –67.7°C
ANSWER: a
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.136 - Use Charles's law. (Example 5.3)
TOPICS: phases
gas
24. A flexible container is charged with 79.00 L of gas at 352 Κ. Under conditions of constant pressure and
moles of gas, what is the volume of the gas when the temperature is decreased by a factor of three?
a. 26.3 L
b. 237 L
c. 0.00421 L
d. 79 L
e. 11.8 L
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas

25. A flexible container is charged with a certain volume of gas at 315.0 Κ. Under conditions of constant
pressure and moles of gas, how does the temperature of the gas change when the volume is tripled?
a. The temperature increases by a factor of three.
b. The temperature decreases by a factor of four.
c. The temperature decreases by a factor of two.
d. The temperature increases by a factor of four.
e. The temperature increases by a factor of two.
ANSWER: a
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
26. A gas occupies a volume of 2.75 L at 350 mmHg and 200°C. Which mathematical expression gives the
correct volume at 600 mmHg and 250°C?
a.
b.
c.
d.
e.
ANSWER: e
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.137 - Use the combined gas law. (Example 5.4)
TOPICS: phases
gas
KEYWORDS: combined gas law | empirical gas laws
27. A gas occupying a volume of 1.50 L exerts a pressure of 700 mmHg at 200°C. Which mathematical
expression gives the correct pressure at 3.50 L and 350°C?
a.
b.
c.
d.
e.
ANSWER: b
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
28. A rigid container is charged with a gas to a pressure of 740 mmHg at 40.0°C and tightly sealed. If the
temperature of the gas increases by 80.0°C what is the new pressure?
a. 1480 mmHg
b. 589 mmHg
c. 551 mmHg
d. 929 mmHg
e. 1110 mmHg
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
29. The pressure of 6.2 L of nitrogen gas in a flexible container is decreased to one-half its original pressure,
and its absolute temperature is increased to double the original temperature. The volume is now
a. 3.1 L.
b. 6.2 L.
c. 12 L.
d. 25 L.
e. 1.6 L.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
30. Which of the following concerning the ideal gas law is/are true?
Pressure is directly proportional to volume when temperature and moles of gas
1.
are held constant.
Pressure is directly proportional to moles of gas when temperature and volume
2.
are held constant.
Volume is inversely proportional to temperature when the pressure and moles of
3.
gas are held constant.
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2 only
e. 2 and 3 only
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
TOPICS: phases
gas
31. A given mass of gas occupies a volume of 4.00 L at 60°C and 550 mmHg. Which of the following
mathematical expressions will yield its temperature at 2.50 L and 900 mmHg?
a.
b.

c.
d.
e.
ANSWER: d
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
32. A fixed amount of gas in a rigid container is heated from 300 to 600 K. Which of the following responses
best describes what will happen to the pressure of the gas?
a. The pressure will increase by a factor of 2.
b. The pressure will increase by a factor less than 2.
c. The pressure will increase by a factor greater than 2.
d. The pressure will decrease by a factor of 2.
e. The pressure will remain the same.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
33. A 23.6 -L sample of nitrogen at 4.45 atm and 23°C is simultaneously expanded to 50.8 L and heated to
37°C. What is the new pressure of the gas?
a. 3.33 atm
b. 2.17 atm
c. 167 atm
d. 257 atm
e. 1.97 atm
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
34. A fixed amount of gas in a rigid container is heated from 100°C to 600°C. Which of the following responses
best describes what will happen to the pressure of the gas?
a. The pressure will increase by a factor greater than 6.
b. The pressure will increase by a factor of 6.
c. The pressure will increase by a factor less than 6.
d. The pressure will decrease by a factor of 6.
e. The pressure will remain the same.
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
35. Equal volumes of propane, C3H8, and carbon monoxide, CO, at the same temperature and pressure have the
same
a. chemical properties.
b. number of atoms.
c. average molecular speed.
d. density.
e. number of molecules.
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
LEARNING OBJECTIVES: GENE.EBBI.13.138 - State Avogadro's law.
TOPICS: phases
gas
KEYWORDS: Avogadro's law | empirical gas laws
36. A 1.00-L bulb contains a sample of O2 at 25°C and 1.00 atm pressure. A second 1.00-L bulb contains a
sample of CH4 at 25°C and 1.00 atm pressure. What is the ratio of the number of molecules of methane to the
number of molecules of oxygen in each of the containers?
a. 2:5
b.
c. 5:2
d.
e. 1:1
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
TOPICS: phases
gas
37. Which of the following statements, concerning equal volumes of the gases dinitrogen monoxide, N2O, and
propane, C3H8, at the same temperature and pressure, is not correct?
a. The moles of N2O and C3H8 are equal.
b. They have the same density.
c. They have the same number of molecules.
d. They have the same number of atoms.
e. They have the same absolute temperature.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2

TOPICS: phases
gas
38. What volume of sulfur trioxide gas, SO3, has the same number of atoms as 4 L of helium gas at the same
temperature and pressure?
a. 20 L
b. 0.8 L
c. 4 L
d. 1 L
e. 16 L
ANSWER: d
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
39. What volume of gaseous oxygen, O2, has the same moles of gas as 3 L of argon gas at the same temperature
and pressure?
a. 9 L
b. 1 L
c. 3 L
d. 1.5 L
e. 6 L
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.2
HAS VARIABLES: True
TOPICS: phases
gas
40. A gas occupies a volume of 2.00 L at 780 mmHg and 70.0°C. Which of the following mathematical
expressions will yield its volume at STP?
a.

b.
c.
d.
e.
ANSWER: a
POINTS: 1
REFERENCES: 5.2
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.139 - Define standard temperature and pressure (STP).
TOPICS: phases
gas
41. Which conditions of P, T, and n, respectively, are most ideal?

a. low P, low T, low n
b. high P, low T, high n
c. low P, high T, high n
d. low P, high T, low n
e. high P, high T, high n
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
LEARNING OBJECTIVES: GENE.EBBI.13.140 - State what makes a gas an ideal gas.
TOPICS: phases
gas
KEYWORDS: ideal gas law
42. The behavior of PH3(g) is most likely to approach ideal behavior at

a. 1.0 atm and 100°C.
b. 0.10 atm and –100°C.
c. 10 atm and 100°C.

d. 0.10 atm and 100°C.
e. 1.0 atm and 0°C.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
LEARNING OBJECTIVES: GENE.EBBI.13.140 - State what makes a gas an ideal gas.
TOPICS: phases
gas
43. For an ideal gas, which of the following statements is true?

a. P is inversely proportional to n at constant V and T.
b. V is inversely proportional to T at constant n and P.
c. V is inversely proportional to n at constant P and T.
d. n is inversely proportional to T at constant P and V.
e. P is inversely proportional to T at constant n and V.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.141 - Learn the ideal gas law equation.
TOPICS: phases
gas
44. The volume of 1 mol of nitrogen

a. is lower than that of 1mol ammonia at high pressures.
b. is decreased by decreasing the pressure of the gas.
c. has the value of 22.4 L at 0°C and 1.00 atm.
d. is decreased by increasing its kinetic energy.
e. is increased by decreasing the temperature.
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
TOPICS: phases
gas
45. Which of the following graphs does not correctly describe the ideal gas law?
a.
b. They all correctly represent the ideal gas law.

c.
d.
e.
ANSWER: b
POINTS: 1
REFERENCES: 5.3
LEARNING OBJECTIVES: GENE.EBBI.13.142 - Derive the empirical gas laws from the ideal gas law.
(Example 5.5)
TOPICS: phases
gas
46. What is the pressure of a 34.8-L gas sample containing 7.45 mol of gas at
19.9°C? (R = 0.0821 L • atm/(K • mol), 1 atm = 760 torr)
a. 2.66 × 102 mmHg
b. 6.77× 10–3 mmHg
c. 5.14 mmHg
d. 3.91 × 103 mmHg
e. 1.48 × 102 mmHg
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.143 - Use the ideal gas law. (Example 5.6)
TOPICS: phases
gas
KEYWORDS: calculations with the ideal gas law | ideal gas law
47. How many moles of gas are in a gas sample occupying 0.816 L at 127 mmHg and 22°C?
a. 178 mol
b. 4.28 mol
c. 57.4 mol
d. 0.00563 mol
e. 0.000462 mol
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
48. How many moles of gas are in a gas sample occupying 1.40 L at 553 mmHg and 294 K?
a. 32.1 mol
b. 0.0422 mol
c. 23.7 mol
d. 0.00346 mol
e. 2.63 mol
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
49. Which of the following statements is incorrect regarding a 128-g sample of gaseous sulfur dioxide at 0°C
and 760 mmHg pressure?
a. The density of the gas is 2.86 g/L.
b. There are 2 × 6.02 × 1023 atoms of oxygen present.
c. There are 2 mol of gas present.
d. The molar mass of the gas is 64 g/mol.
e. The volume of the gas is 44.8 L.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
50. The following gases are stored in identical flexible containers at 25°C and 1.00 atm pressure. Order the
gases from highest to lowest density.
1. 200 g propane, C3H8
2. 100 g carbon dioxide, CO2
3. 50 g nitrous oxide, N2O

a. 1 ≈ 2 ≈ 3
b. 3 > 2 > 1
c. 1 > 2 > 3
d. 2 > 1> 3
e. 1 > 2 ≈ 3
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
TOPICS: phases
gas
51. Which of the following samples has the fewest moles of gas?
a. 1.00 L of CH4 at STP
b. 1.00 L of Ar at –10.0°C and 1.00 atm
c. 1.00 L of NH3 at STP
d. 1.00 L of H2 at 0.0°C and 1.54 atm
e. 1.00 L of HCl at 20°C and 1.00 atm
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
52. A 3.74-L cylinder contains 4.17 g of methane, CH4, at a pressure of 3020 mmHg. What is the temperature
of the gas?
a. 696°C
b. 423°C
c. 969°C
d. 2900°C
e. 129°C
ANSWER: b
POINTS: 1

DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
53. The number of molecules in 1.0 L of air at 0°C and 1.0 atm pressure is
a. between 1020 and 1021.
b. between 1023 and 6 × 1023.
c. between 1022 and 1023.
d. less than 1020.
e. between 1021 and 1022.
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
TOPICS: phases
gas
54. A mixture consisting of 0.140 mol N2, 0.037 mol O2, 0.104 mol CH4, and an unknown amount of CO2
occupies a volume of 8.48 L at 27°C and 1.06 atm pressure. How many moles of CO2 are there in this sample?
a. 0.719 mol
b. 0.0839 mol
c. 2.45 mol
d. 3.77 mol
e. 0.364 mol
ANSWER: b
POINTS: 1
DIFFICULTY: difficult
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
55. Which of the following gases has the greatest density at 2.5 atm and 25°C?
a. C4H8
b. SO2
c. N2O
d. O2
e. NF3
ANSWER: e
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.144 - Calculate gas density. (Example 5.7)
TOPICS: phases
gas
KEYWORDS: gas density | ideal gas law
56. The density of ethane, C2H6 (30.1 g/mol), at 25°C and 1.13 atm pressure is
a. 1.39 g/L.
b. 16.6 g/L.
c. 1.34 g/L.
d. 0.719 g/L.
e. 0.136 g/L.
ANSWER: a
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
57. The density of O2 gas at 16°C and 1.27 atm is

a. 31 g/L.
b. 28.4 g/L.
c. 1.71 g/L.
d. 88.7 g/mL.
e. 0.584 g/L.
ANSWER: c
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
58. A 1.00-L sample of a gas at STP has a mass of 0.759 g. The molar mass of the gas is
a. 3.39 g/mol.
b. 17.0 g/mol.
c. 22.4 g/mol.
d. 44.8 g/mol.
e. 295 g/mol.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.145 - Determine the molecular weight of a vapor. (Example 5.8)
TOPICS: gas
phases
59. The density of a gas is 0.803 g/L at STP. What is its molar mass?
a. 5.0 g/mol
b. 24.1 g/mol
c. 27.9 g/mol
d. 22.4 g/mol
e. 18.0 g/mol
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
60. A 1.50-L sample of a gas at STP has a mass of 4.75 g. What is one possible formula of the gas?
a. C2F4
b. NF3
c. PCl3
d. NHF2
e. NO2
ANSWER: b
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
61. At 530.4 mmHg and 55.3oC, a 3.14-L sample of a hydrocarbon gas has a mass of 2.28 g. What is the
formula of the gas?
a. C2H6
b. C2H4
c. C2H2
d. C3H6
e. C3H8
ANSWER: b
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
62. It is found that at 26°C and 1.00 atm pressure, 2.50 L of gas has a mass of 2.85 g. Its molar mass is
a. 38.3 g/mol.
b. 28.0 g/mol.
c. 35.7 g/mol.
d. 24.3 g/mol.
e. 33.4 g/mol.
ANSWER: b
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
63. At 25°C and 449 mmHg, an unknown pure gas has a density of 0.676 g/L. Which of the following gases
could be the unknown gas?
a. Cl2
b. C3H6
c. Cl2O
d. Ne
e. N2
ANSWER: e
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
64. An unknown gaseous hydrocarbon consists of 85.63% carbon by mass. A 0.959-g sample of the gas
occupies a volume of 0.51 L at STP. What is the identity of the gas?
a. C3H6

b. C4H8
c. C5H10
d. CH2
e. C2H4
ANSWER: a
POINTS: 1
REFERENCES: 5.3
HAS VARIABLES: True
TOPICS: phases
gas
65. An excess of sodium hydroxide is treated with 2.9 L of dry hydrogen chloride gas measured at STP. What is
the mass of sodium chloride is formed?
a. 1.45g
b. 15.1 g
c. 7.6 g
d. 15 g
e. 169 g
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.4
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.146 - Solving stoichiometry problems involving gas volumes.
(Example 5.9)
TOPICS: phases
gas
66. The balanced chemical equation for the conversion of nitrogen to ammonia is:
2N2(g) + 3H2(g) → 2NH3(g)
Which of the following statements concerning this chemical equation is/are correct?
In a 22.4 L container at standard temperature, 2 atm of nitrogen gas will react
1.
with 3 atm of hydrogen gas to produce 2 atm of ammonia gas.
At standard pressure and temperature, 22.4 L of nitrogen gas will react with 22.4
2.
L of hydrogen gas to produce 22.4 L of ammonia gas.
At standard pressure and temperature, 44.8 L of nitrogen gas will react with 67.2
3.
L of hydrogen gas produce 22.4 L of ammonia gas .
a. 1 only
b. 2 only
c. 3 only
d. 1 and 2
e. 1, 2, and 3
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.4
(Example 5.9)
TOPICS: phases
gas
67. A 22.4 L high pressure reaction vessel is charged with 0.5020 mol of iron powder and 1.39 atm of oxygen
gas at standard temperature. On heating, the iron and oxygen react according to the balanced reaction below.
4Fe(s) + 3O2(g) → 2Fe2O3(s)

After the reaction vessel is cooled, and assuming the reaction goes to completion, what pressure of oxygen
remains?
a. 1 atm
b. 1.385 atm
c. 0.715 atm
d. 0.376 atm
e. 0.251 atm
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
68. A high temperature reaction vessel is charged with 0.5080 mol of iron powder and 42.1 L of oxygen gas at
standard temperature at pressure. On heating, the iron and oxygen react according to the balanced reaction
below.
4Fe(s) + 3O2(g) → 2Fe2O3(s)

After the reaction vessel is cooled, and assuming the reaction goes to completion, what volume of oxygen
remains?
a. 33.5 L

b. 42.1 L
c. 26.9 L
d. 8.53 L
e. 0.254 L
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
69. What is the total volume of gases produced at 1092 K and 1.00 atm pressure when 320 g of ammonium
nitrite undergoes the following decomposition reaction?
NH4NO2(s) → N2(g) + 2H2O(g)
a. 4 × 22.4 L
b. 22.4 L
c. 20 × 22.4 L
d. 5 × 22.4 L
e. 60 × 22.4 L
ANSWER: e
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
KEYWORDS: ideal gas law | stoichiometry and gas volumes
70. In which of the following reactions will the pressure increase upon completion of the reaction at constant
temperature?
a. C(s) + O2(g) → CO2(g)
b. 2NO(g) + O2(g) → 2NO2(g)
c. C2H6O(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
d. 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
e. Cl2(g) + 3F2(g) → 2ClF3(g)
ANSWER: d
POINTS: 1
REFERENCES: 5.4
(Example 5.9)
TOPICS: phases
gas
71. What volume of ammonia gas, measured at 547.9 mmHg and 27.6oC, is required to produce 8.98 g of
ammonium sulfate according to the following balanced chemical equation?
2NH3(g) + H2SO4(aq) → (NH4)2SO4(s)
a. 0.000992 L
b. 0.00397 L
c. 1.16 L
d. 18 L
e. 4.65 L
ANSWER: e
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
72. If 636.0 mL of nitrogen gas, measured at 488.9 mmHg and 22.3oC, reacts with excess iodine according to
the following reaction, what mass of nitrogen triiodide is produced?
N2(g) + 3I2(s) → 2NI3(s)
a. 0.472 g
b. 6.66 g
c. 3.33 g
d. 13.3 g
e. 176 g
ANSWER: d
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
73. The following equation represents the partial combustion of methane, CH4.
2CH4(g) + 3O2(g) → 2CO(g) + 4H2O(g)
At constant temperature and pressure, what is the maximum volume of carbon monoxide that can be obtained
from 6.62 × 102 L of methane and 3.31 × 102 L of oxygen?
a. 9.93 × 102 L
b. 6.62 × 102 L
c. 2.32 × 103 L
d. 2.21 × 102 L
e. 1.32 × 103 L
ANSWER: d
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
74. Calcium nitrate will react with ammonium chloride at slightly elevated temperatures, as represented in the
equation below.
Ca(NO3)2(s) + 2NH4Cl(s) → 2N2O(g) + CaCl2(s) + 4H2O(g)
What is the maximum volume of N2O at STP that could be produced using a 5.20-mol sample of each reactant?
a. 1.42 × 103 L
b. 233 L
c. 8.58 × 10–3 L
d. 116 L
e. 22.4 L
ANSWER: d
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
75. The following equation represents the oxidation of ammonia, NH3.

4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)
At the same temperature and pressure, what is the maximum volume of nitrogen monoxide that can be obtained
from 7.55 × 102 L of ammonia and 7.55 × 102 L of oxygen?
a. 1.7 × 103 L
b. 3.36 × 102 L
c. 6.04 × 102 L
d. 1.51 × 103 L
e. 7.55 × 102 L
ANSWER: c
POINTS: 1
REFERENCES: 5.4
HAS VARIABLES: True
(Example 5.9)
TOPICS: phases
gas
76. A vessel with a volume of 12.4 L contains 2.80 g of nitrogen gas, 0.403 g of hydrogen gas, and 79.9 g of
argon gas. At 25°C, what is the pressure in the vessel?
a. 164 atm
b. 256.2 atm
c. 4.54 atm
d. 0.380 atm
e. 2.27 atm
ANSWER: c

POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.147 - Learn the equation for Dalton's law of partial pressures.
TOPICS: phases
gas
KEYWORDS: Dalton's law of partial pressures | gas mixtures
77. What is the volume occupied by a mixture of 0.774 mol of N2 and 0.774 mol of O2 gases at 1.04 atm and
25.6°C?
a. 1.1 × 103 L
b. 36.5 L
c. 1.56 L
d. 3.12 L
e. 18.2 L
ANSWER: b
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.147 - Learn the equation for Dalton's law of partial pressures.
TOPICS: phases
gas
78. In a mixture of argon and hydrogen, occupying a volume of 1.86 L at 626.0 mmHg and 46.8oC, it is found
that the total mass of the sample is 1.8 g. What is the partial pressure of argon?
a. 313 mmHg
b. 476 mmHg
c. 595 mmHg
d. 149 mmHg
e. 30 mmHg
ANSWER: b
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True

LEARNING OBJECTIVES: GENE.EBBI.13.148 - Calculate the partial pressure and mole fractions of a gas in a
mixture. (Example 5.10)
TOPICS: phases
gas
KEYWORDS: gas mixtures
79. The partial pressures of CH4, N2, and O2 in a sample of gas were found to be 183 mmHg, 443 mmHg, and
693 mmHg, respectively. What is the mole fraction of nitrogen?
a. 21.7
b. 0.912
c. 0.525
d. 0.410
e. 0.336
ANSWER: e
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
TOPICS: phases
gas
80. A 15.6-g mixture of nitrogen and carbon dioxide is found to occupy a volume of 9.9 L when measured at
940.2 mmHg and 54.9°C. What is the mole fraction of carbon dioxide in this mixture?
a. 0.486
b. 0.5
c. 0.513
d. 0.597
e. 0.402
ANSWER: e
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
TOPICS: phases
gas
81. A 28.3-g mixture of oxygen and argon is found to occupy a volume of 17.2 L when measured at
882.7 mmHg and 39.3oC. What is the partial pressure of oxygen in this mixture?
a. 369 mmHg
b. 441 mmHg
c. 512 mmHg
d. 418 mmHg
e. 464 mmHg
ANSWER: d
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
TOPICS: phases
gas
82. In a mixture of helium and chlorine, occupying a volume of 12.8 L at 605.6 mmHg and 21.6oC, it is found
that the partial pressure of chlorine is 143 mmHg. What is the total mass of the sample?
a. 31.6 g
b. 0.4 g
c. 8.37 g
d. 1.28 g
e. 7.09 g
ANSWER: c
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
TOPICS: phases
gas

83. What is the partial pressure of carbon dioxide in a container that contains 3.63 mol of oxygen, 1.49 mol of
nitrogen, and 4.49 mol of carbon dioxide when the total pressure is 871 mmHg?
a. 329 mmHg
b. 763 mmHg
c. 135 mmHg
d. 406 mmHg
e. 871 mmHg
ANSWER: d
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
TOPICS: phases
gas
84. A sample of oxygen is collected over water at a total pressure of 678.4 mmHg at 25°C. The vapor pressure
of water at 25°C is 23.8 mmHg. The partial pressure of the O2 is
a. 0.9239 atm.
b. 0.9161 atm.
c. 0.8926 atm.
d. 1.092 atm.
e. 0.8613 atm.
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.5
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.149 - Calculate the amount of gas collected over water. (Example
5.11)
TOPICS: phases
gas
KEYWORDS: collecting gases over water | gas mixtures
85. A sample of hydrogen was collected by water displacement at 23.0°C and an atmospheric pressure of 735
mmHg. Its volume is 568 mL. After water vapor is removed, what volume would the hydrogen occupy at the
same conditions of pressure and temperature? (The vapor pressure of water at 23.0°C is 21 mmHg.)
a. 509 mL
b. 539 mL
c. 552 mL
d. 568 mL
e. 585 mL
ANSWER: c
POINTS: 1
REFERENCES: 5.5
5.11)
TOPICS: phases
gas
KEYWORDS: collecting gases over water | gas mixtures
86. A small amount wet of hydrogen gas (H2) can be prepared by the reaction of zinc with excess hydrochloric
acid and trapping the gas produced in an inverted tube initially filled with water. If the total pressure of the gas
in the collection tube is 757.9 mmHg at 25°C, what is the partial pressure of the hydrogen? The vapor pressure
of water is 23.8 mmHg.
a. 734.1 mmHg
b. 781.7 mmHg
c. 757.9 mmHg
d. 32.8 mmHg
e. 47.7 mmHg
ANSWER: a
POINTS: 1
REFERENCES: 5.5
HAS VARIABLES: True
5.11)
TOPICS: phases
gas
87. Which statement is inconsistent with the kinetic theory of an ideal gas?
a. Most of the volume occupied by a gas is empty space.
b. The forces of repulsion between gas molecules are very weak or negligible.
c. Gas molecules move in a straight line between collisions.
d. The average kinetic energy of a gas is proportional to the absolute temperature.
e. The collisions between gas molecules are inelastic.
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
LEARNING OBJECTIVES: GENE.EBBI.13.150 - List the five postulates of the kinetic theory.
TOPICS: phases
gas
KEYWORDS: kinetic theory of an ideal gas | postulates of kinetic theory
88. Which of the following is included as a postulate in the kinetic molecular theory of an ideal gas?
a. Collisions between molecules are all elastic.
b. All molecules move randomly in zigzag directions.
c. The distance between gas molecules is small compared with the size of the molecule.
d. All the molecules have the same velocity.
e. In an average collision between molecules, both molecules have the same kinetic energy.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
TOPICS: phases
gas
89. Which of the following is not a postulates of the kinetic molecular theory of gases?
a. The gas molecules are in constant motion.
b. At a constant temperature, each molecule has the same kinetic energy.
c. The collisions between molecules are elastic.
d. The volumes of the molecules are negligible compared with the volume of the container.
e. The gas molecules are in rapid motion.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
TOPICS: phases
gas
90. Which of the following statements is least likely to be true of a sample of nitrogen gas at STP?
a. Collisions between the gaseous molecules are elastic.
b. The intermolecular forces between nitrogen molecules are not negligible.
c. Molecules of gaseous nitrogen are in constant random motion.
d. The average kinetic energy of the gaseous nitrogen is proportional to the absolute temperature of the
gas.
e. The pressure exerted by gaseous nitrogen is due to collisions of the molecules with the walls of the
container.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
TOPICS: phases
gas
KEYWORDS: kinetic-molecular theory
91. If a sample of nitrogen gas in a sealed container of fixed volume is heated from 25°C to 125°C, the value of
which of the following quantities will remain constant?
a. the average speed of the molecules
b. the density of the nitrogen
c. the average intensity of a molecular collision with the walls of the container
d. the average kinetic energy of the molecules
e. the pressure of the gas
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.151 - Provide a qualitative description of the gas laws based on the
kinetic theory.
TOPICS: phases
gas

92. A sealed 22.4 L flask contains pure O2 at STP. A second sealed 22.4 L flask contains CH4 at STP. Which of
the following statements concerning the molecules in the flasks is/are true?
The average kinetic energy of the O2 molecules is greater than the average
1.
kinetic energy of CH4 molecules.
The average velocity of the CH4 molecules is greater than the average velocity
2.
of the O2 molecules.
The volume occupied by the gas molecules in both flasks is small relative to the
3.
total volume of the flasks.
a. 1 only
b. 2 only
c. 3 only
d. 2 and 3
e. 1, 2, and 3
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.6
kinetic theory.
TOPICS: phases
gas
93. Which of the following statements concerning a sample of oxygen gas at 1.00 atm pressure is incorrect?
a. The molecules are in constant rapid random motion.
b. The pressure exerted by gaseous oxygen is due to the impact of the molecules with the walls of the
container.
c. The average kinetic energy of the gaseous oxygen is inversely proportional to the absolute
temperature of the gas.
d. The volume occupied by the oxygen molecules is negligible compared with the size of the container.
e. Collisions between the gaseous molecules are elastic.
ANSWER: c
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
LEARNING OBJECTIVES: GENE.EBBI.13.152 - Describe how the root-mean-square (rms) molecular speed
of gas molecules varies with temperature.
TOPICS: phases
gas
94. According to the postulates of the kinetic theory of gases, the root-mean-square (rms) speed of the
molecules of a given gas is proportional to the
a. reciprocal of the absolute temperature.
b. Celsius temperature squared.
c. absolute temperature.
d. square root of the absolute temperature.
e. absolute temperature squared.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
TOPICS: phases
gas
KEYWORDS: molecular speed
95. At STP, as the molar mass of the molecules that make up a pure gas increases, the
a. root mean square speed of the molecules increases.
b. root mean square speed of the molecules decreases.
c. root mean square speed of the molecules remains constant.
d. root mean square speed increases to a maximum, then decreases.
e. none of the above.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
TOPICS: phases
gas
96. What is the ratio of the average speed of SO2 molecules to that of oxygen molecules at 298 K?
a. :
b. :
c. 2:1

d. 1:2
e. 1:1
ANSWER: b
POINTS: 1
REFERENCES: 5.7
TOPICS: phases
gas
97. Molecular speed distributions for a gas at two different temperatures are shown below. Which of the
following graphs correctly describes the distributions at the two temperatures, where T2 > T1? NOTE: The small
vertical lines indicate average speed.
a.
b.
c.

d.
e. none of the above

ANSWER: a
POINTS: 1
REFERENCES: 5.7
LEARNING OBJECTIVES: GENE.EBBI.13.153 - Describe the molecular-speed distribution of gas molecules
at different temperatures.
TOPICS: phases
gas
98. Calculate the root-mean-square velocity for the O2 molecules in a sample of O2 gas at 28.3°C.
(R = 8.3145 J/K⋅mol)
a. 15.33 m/s
b. 148.5 m/s
c. 279.8 m/s
d. 484.6 m/s
e. 9.229 × 1026 m/s
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.154 - Calculate the rms speed of gas molecules. (Example 5.12)
TOPICS: phases
gas
99. What is the ratio of the average speed of He molecules to that of CH4 molecules at 298 K?
a. 1:1
b. 11:7
c. 2:3
d. 3:2
e. 2:1
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.154 - Calculate the rms speed of gas molecules. (Example 5.12)
TOPICS: phases
gas
100. Which of the following relates the rate of effusion of a gas to the square root of its molar mass?
a. Boyle’s law
b. Graham’s law
c. Charles’s law
d. Dalton’s law
e. Avogadro’s hypothesis
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
LEARNING OBJECTIVES: GENE.EBBI.13.155 - Define effusion and diffusion.
TOPICS: phases
gas
KEYWORDS: effusion | molecular speed
101. What is the ratio of the average rate of effusion of CH4(g) to that of NOF(g) at 400 K?
a. 49:16
b. 4:7
c. 16:49
d. 7:4
e. The average rate of effusion is the same for the two gases.
ANSWER: d
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.156 - Calculate the ratio of effusion rates of gases. (Example 5.13)
TOPICS: phases
gas
102. Which of the following gases will have the slowest rate of effusion at constant temperature?
a. H2
b. F2
c. Ne
d. SO3
e. CF4
ANSWER: e
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.7
TOPICS: phases
gas
103. The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 60 s
for the gas to effuse, whereas nitrogen gas required 48 s. The molar mass of the gas is
a. 25 g/mol.
b. 35 g/mol.
c. 18 g/mol.
d. 31 g/mol.
e. 44 g/mol.
ANSWER: e
POINTS: 1
REFERENCES: 5.7
HAS VARIABLES: True
TOPICS: phases
gas

104. If 250 mL of methane, CH4, effuses through a small hole in 20 s, the time required for the same volume of
helium to pass through the hole under the same conditions will be
a. 40 s.
b. 5 s.
c. 1.3 s.
d. 10 s.
e. 80 s.
ANSWER: d
POINTS: 1
REFERENCES: 5.7
HAS VARIABLES: True
TOPICS: phases
gas
105. Under what set of conditions does HCl(g) deviate the most from ideal behavior?
a. standard temperature and pressure
b. high temperature and low pressure
c. low temperature and high pressure
d. low temperature and low pressure
e. high temperature and high pressure
ANSWER: c
POINTS: 1
REFERENCES: 5.8
LEARNING OBJECTIVES: GENE.EBBI.13.157 - Explain how and why a real gas is different from an ideal
gas.
TOPICS: phases
gas
KEYWORDS: real gases
106. Real gases deviate from ideal behavior for two reasons: (1) real gas molecules have intermolecular forces,
and (2) real gas molecules have
a. pressures within the chemical bonds.
b. nonzero molecular volumes.
c. ionization energies.
d. molecular vibrations.
e. a distribution of molecular speeds.
ANSWER: b
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.8
gas.
TOPICS: phases
gas
107. At 320 K and 16 atm pressure, the molar volume of ammonia, NH3, is about 10% less than the molar
volume of an ideal gas. The best explanation for actual volume being this much smaller than ideal volume is
that
a. the intermolecular forces of attraction become significant at this temperature and this pressure.
b. the critical temperature and pressure of NH3 (405 K and 112 atm) are too close to the actual
temperature and pressure of the NH3 above.
c. at this high temperature, a significant amount of NH3 decomposes to N2 and H2.
d. ammonia is a real gas and not an ideal gas.
e. the volume occupied by the NH3 molecules themselves is significant at this high concentration.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.8
gas.
TOPICS: phases
gas
108. Which of the following statements concerning gas molecules is incorrect?

a. Attraction is greater between fast-moving molecules than between slow-moving molecules.
b. Real molecules have a weak attraction for each other.
c. Real molecules have the greatest attraction for each other at low temperatures.
d. Real molecules have the greatest attraction for each other at high pressures.
e. Real molecules occupy a finite space.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
REFERENCES: 5.8
gas.
TOPICS: phases
gas
109. Using the van der Waals equation, determine the pressure of 500.0 g of SO2(g) in a 6.30-L vessel at
633 K. For SO2(g), a = 6.865 L2 • atm/mol2 and b = 0.05679 L/mol. (R = 0.0821 L • atm/(K • mol))
a. 79.7 atm
b. 8.49 atm
c. 58.7 atm
d. 64.3 atm
e. 8.66 atm
ANSWER: c
POINTS: 1
REFERENCES: 5.8
HAS VARIABLES: True
LEARNING OBJECTIVES: GENE.EBBI.13.158 - Use the van der Waals equation. (Example 5.14)
TOPICS: phases
gas
110. In the van der Waals equation,
the effect of intermolecular forces is accounted for by

a. T.
b. V.
c. b.
d. a.
e. P.
ANSWER: d
POINTS: 1
REFERENCES: 5.8
TOPICS: phases
gas
111. From a consideration of the van der Waals constants for water and sulfur dioxide,
a (atm⋅L2/mol2) b (L/mol)
H2O 5.54 0.0305
SO2 6.87 0.0568
we can conclude that
a. H2O molecules are smaller and less attracted to each other than SO2 molecules.
b. H2O molecules are larger and less attracted to each other than SO2 molecules.
c. H2O molecules are larger and more attracted to each other than SO2 molecules.
d. H2O molecules are equivalent to SO2 molecules in size and attraction to each other.
e. H2O molecules are smaller and more attracted to each other than SO2 molecules.
ANSWER: a
POINTS: 1
REFERENCES: 5.8
TOPICS: phases
gas
112. How is kinetic energy (Ek) related to the mass of a body (m) and its speed (v)?
a. Ek = (m * v2) / 2
b. Ek = m * v
c. Ek = 2m / v
d. Ek = (m2) / v
e. Ek = m + v
ANSWER: a
POINTS: 1
DIFFICULTY: Easy
REFERENCES: 5.6
TOPICS: Kinetic Theory of an Ideal Gas
113. Which of the following is/are true of Avogadro’s law?

1. Avogadro’s law relates the volume of a gas to the moles of the gas at constant temperature and pressure.
2. Avogadro’s law states that the pressure of a gas decreases if the volume is increased at constant temperature
and molar concentration.
3. Avogadro’s law states that the pressure of a gas increases with the increase in its temperature at constant
volume and molar concentration.
a. 1 only
b. 2 only
c. 3 only
d. 2 and 3
e. 1 and 3
ANSWER: a
POINTS: 1
DIFFICULTY: Moderate
REFERENCES: 5.6
kinetic theory.
TOPICS: Kinetic Theory of an Ideal Gas
114. What does R denote in the ideal gas equation, PV = nRT?

a. Coulomb’s constant
b. Rydberg constant
c. Boltzmann constant
d. Atomic mass constant
e. Molar gas constant
ANSWER: e
POINTS: 1
DIFFICULTY: Easy
REFERENCES: 5.3
TOPICS: The Ideal Gas Law
115. Identify the true statement(s) about the van der Waals equation.
1. The volume, V, in the ideal gas equation is replaced by (V – nb) in the van der Waals equation.
2. The volume, V, in the ideal gas equation is replaced by (V + nb) in the van der Waals equation.
3. The pressure, P, in the ideal gas equation is replaced by (P + a2nV) in the van der Waals equation.
a. 1 only
b. 2 only
c. 3 only
d. 2 and 3
e. 1 and 3
ANSWER: a
POINTS: 1
DIFFICULTY: Easy
REFERENCES: 5.8
TOPICS: Real Gases
116. The _____ is an equation similar to the ideal gas law, but includes two constants, a and b, to account for
deviations from ideal behavior.
a. Clasius-Clapeyron equation
b. van der Waals equation
c. de Broglie equation
d. Laue equation
e. Arrhenius equation
ANSWER: b
POINTS: 1
DIFFICULTY: Easy
REFERENCES: 5.8
TOPICS: Real Gases

General Chemistry 11th Edition Ebbing Test Bank 1

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Chapter 05 - The Gaseous State

General Chemistry 11th Edition by Ebbing

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1. Which of the following concerning a barometer or manometer is/are true?

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20. Absolute zero is the point at which

22. Which of the following is a correct statement of Charles’s law, ?

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41. Which conditions of P, T, and n, respectively, are most ideal?

42. The behavior of PH3(g) is most likely to approach ideal behavior at

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43. For an ideal gas, which of the following statements is true?

44. The volume of 1 mol of nitrogen

b. They all correctly represent the ideal gas law.

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57. The density of O2 gas at 16°C and 1.27 atm is

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4Fe(s) + 3O2(g) → 2Fe2O3(s)

4Fe(s) + 3O2(g) → 2Fe2O3(s)

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75. The following equation represents the oxidation of ammonia, NH3.

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e. none of the above

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108. Which of the following statements concerning gas molecules is incorrect?

110. In the van der Waals equation,

the effect of intermolecular forces is accounted for by

113. Which of the following is/are true of Avogadro’s law?

114. What does R denote in the ideal gas equation, PV = nRT?

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