Mole Concept
Mole Concept
Mole Concept
CONC
EPT
OBJECTI
VES
Use the mole concept to express mass of
substances
Perform some calculations involving mole,
mass, percentage composition, and empirical
and molecular formulas
Infer the significance of the mole concept.
What’s the
word?
SAMS
MASS
OLME
MOL
E
TOMICA
AMSS
ATOMIC
MASS
REPENTCAGE
PERCENTA
GE
MOPCOSINIOT
COMPOSITI
ON
1 pair = 2
1 DOZEN
= 12
1 ream =
500
1 MOLE = 6.02 X
AVOGADRO’S NUMBER
602,200,000,000,000,000,000,000
TRIVIA
TIME!
AMADEO
AVOGADRO
AVOGADRO’S
● It is the number of particles
NUMBER
found in one mole of a
substance. It is the number of
atoms in exactly 12 grams of
Carbon-12
WHAT
is
MOLE?
MOLE
(Abbreviated
mol)
MOLE
1. It is fundamental (SI) unit used to measure the
amount of substance. In Latin, mole means a
‘massive heap” of material.
2. It can be defined as the number equal to the number
of Carbon atoms in 12.01 grams of Carbon.
3. A mole is also the atomic or formula mass of a
substance expressed in grams.
DON’T
FORGET!
Unlocking of
Terms:
Mole:
Molecules:
MOLE TO
MOLECULES
Example #1
MOLES MOLECULES
EXAMPLE #1
How many molecules are there in 4.0 moles of CO2?
EXAMPLE #2
Methane (CH4) is the simplest form of hydrocarbon. How
many moles are there in 3.01x1023 molecules of CH4?
MOLECULES
TO MOLES
EXAMPLE #1
Water is said to be an excellent solvent. It can easily
dissolve polar and ionic solutes. How many water
molecules are there in 120 moles of water?
EXAMPLE #2
Sodium bicarbonate (NaHCO3) or baking soda is used in
baking. How many molecules are there in 100 moles of
sodium bicarbonate?
How much
is in a
MOLE?
Calculating
Moles and
Number of
Atoms
Example #1
Aluminum (Al), a metal with high strength-to-weight
ratio and a high resistance to corrosion, is often used
for structures such as high-quality bicycle frames.
In a 10.0 gram of aluminum, compute the following:
a. Number of moles
b. Number of atoms
1 mol of Al = 26.98 g Al
ATOMS MOLES
LET’S
RECALL
Percent
Compositio
n of
Compounds
OBJECTIVE
Determine the percent composition of
a compound given its chemical
formula and vice versa
Where do
you see
PERCENTA
GE?
Percent Composition
10 grams of Coffee
13 grams of sugar
12 grams of milk
----------------------
35 grams of 3 in 1 coffee
Take Note!
1 mol of C2H6O molecules consists of 2 mol of carbon
atoms, 6 mol of hydrogen atoms and 1 mol of oxygen
atom.
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
MOLAR MASS
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
MASS PERCENT OF C
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
MASS PERCENT OF H
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
MASS PERCENT OF O
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
MOLAR MASS
CALCULATE THE PERCENT COMPOSITIONS OF
ETHANOL (C2H6O)
Example #2
Glucose (C6H12O6)
MATERIALS:
Grocery item containers or packages (food wrappers, can, bottles,
scissors), calculator, paper and pen.
PROCEDURE:
1. Get 3 samples of containers or packages of grocery items
such as canned goods, snacks, and beverages.
2. List the substances written as contents/ingredients on the
label.
3. Get the amount of Sodium per serving.
4. Compute for the percentage composition of the sodium of the
product based on the RENI’s Recommended Sodium intake =
2,400mg
290mg
PERCENTAGE COMPOSITION OF SODIUM (Na) = X 100 = 12.08 % of Na
2,400mg
(RENI)
END