Mole Calculations Unit Test
Mole Calculations Unit Test
Mole Calculations Unit Test
1.
How many moles are in 325 grams of 6. If the empirical formula for a compound is
iron(III) sulfate, Fe (SO ) ?
NO and its molar mass is 92 g/mol, what is
the molecular formula?
2
4 3
A. 0.467 mol
A. NO
B. 0.812 mol
B. NO
C. 1.23 mol
C. N O
2
D. 2.14 mol
D. N O
2
A. 0.01 10 g
2
B. 0.02 10 g
A. CH O
C. 4.9 10 g
B. CH O
D. 9.8 10 g
C. C H O
D. C HO
4
11
A. 25%
B. 33%
C. 50%
D. 67%
A. 1.68%
B. 20.0%
C. 56.3%
4. Which compound has the greatest
percent by mass of nitrogen?
A. NH
D. 59.4%
B. NF
C. NO
D. NO
A. 6.82 x 10 molecules
-26
B. 1.61 x 10 molecules
-21
C. 2.47 x 10 molecules
22
D. 5.85 x 10 molecules
26
A. C H O
6
12
B. N O
2
C. H SO
2
D. P O
4
10
A. 7.58%
B. 13.9%
C. 45.5%
D. 83.4%
11. In an experiment, Guy gently heated a
hydrated copper compound to remove
the water of hydration. If the compound
originally weighed 1.72 g before heating
and weighed 1.12 g after heating, what
was the percentage of water in the
compound?
A. 6.022 10 atoms
21
B. 6.022 10 atoms
22
C. 1.807 10 atoms
23
A. 34.9%
D. 1.807 10 atoms
24
B. 46.5%
C. 53.5%
D. 65.1%
A. 14 g
12. How many moles of CO are present in a
volume of 1.00 L at STP?
B. 28 g
C. 42 g
A. 0.0446 mol
D. 84 g
B. 0.224 mol
C. 22.4 mol
D. 28.0 mol
A. 29.3%
13. What volume would a 10.0 mole sample
of helium gas occupy at STP?
B. 43.6%
C. 58.5%
A. 0.446 L
D. 87.2%
B. 4.46 L
C. 2.24 L
D. 224 L
A. 2.76 x 10 atoms
-25
B. 9.27 x 10 atoms
-3
C. 1.08 x 10 atoms
2
D. 3.61 x 10 atoms
24
A. KCrSO
B. KCrS O
2
C. K Cr S O
2
14
D. K Cr S O
7
11
23
A. 2.8 x 10 mol
-19
30
B. 3.3 x 10 mol
-18
C. 3.0 x 10 mol
17
D. 3.6 x 10 mol
18
A. 29 g/mol
B. 51 g/mol
C. 270 g/mol
D. 286 g/mol
A. [Ar] 4s
B. [Ar] 4s 3d
2
C. [Ar] 4s
D. [Ar] 3d 4s
10
tetrahydride
A. beta decay
B. nuclear fission
C. nuclear fusion
D. alpha decay
A. N
B. P
C. Sb
D. Bi
A. n=1
B. n=2
C. n=5
D. n=7
Question
Answer
Standard
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
NCES.9_12.SC.CH.2.2.5
10
NCES.9_12.SC.CH.2.2.5
11
NCES.9_12.SC.CH.2.2.5
12
NCES.9_12.SC.CH.2.2.5
13
NCES.9_12.SC.CH.2.2.5
14
NCES.9_12.SC.CH.2.2.5
15
NCES.9_12.SC.CH.2.2.5
16
NCES.9_12.SC.CH.2.2.5
17
NCES.9_12.SC.CH.2.2.5
18
NCES.9_12.SC.CH.2.2.5
19
NCES.9_12.SC.CH.2.2.5
20
NCES.9_12.SC.CH.2.2.5
21
NCES.9_12.SC.CH.1.3.2
22
NCES.9_12.SC.CH.1.2.5
23
NCES.9_12.SC.CH.1.1.4
24
NCES.9_12.SC.CH.1.3.1
25
NCES.9_12.SC.CH.1.1.3