1. Moles, Moles and More Moles

2. What is gram atomic mass?
1 mole of an element =
molar mass of that element
The unit for molar mass is
Gram!

3. What is the mass of 1 mol of each of these elements?
1 mol C =
12.0 g
87.6 g
1 mol Sr =
63.5 g
1 mol Cu =

4. 1 mole of a compound = molar mass of that compound
What is gram mass?
1 mole of a compound =
molar mass of that compound
Example 1: Find the molar mass of K2CO3 K: C: O:
2 x 39.1 =
78.2
1 x 12.0 =
12.0
3 x 16.0 =
48.0
138.2 g
1 mole K2CO3 = g K2CO3

5. The subscripts tell you the number of moles of atoms!
Example 2: Find molar mass of Ca3(PO3)2
Ca: P: O:
3 x 40.1 =
120.3
2 x 31.0 =
62.0
6 x 16.0 =
96.0
278.3 g
1 mole Ca3(PO3)2 = g Ca3(PO3)2

6. 1 mol = molar mass in grams of the element, molecule or ionic compound
We can using dimensional analysis to solve mole problems!
Ex: How many moles are in 4.2 x 1024 grams C2H6?
4.2 x 1024 g C2H6 1
mol C2H6
= 1.4 x 1023 mol C2H6
30.0
g C2H6 C: H:
2 x 12.0 =
24.0
6 x 1.0 =
6.0
30.0 g

7. The Star Nose Mole Map Mole Volume of Solution Molarity (moles/liter)
Volume of Gas
(at STP)
Mass
Molar Mass
(grams)
22.4 (liters)
Mole
Balanced Equation (thermochemical)
6.02 x atoms of element, molecules, formula units
count subscripts
Energy of a Reaction
Representative Particles
Atoms of element formula units
molecules
Number of Atoms in
1 Compound Unit

8. count subscripts # of atoms
Volume of Gas
(at STP)
Representative
Particles
atoms of element
formula units
molecules
_ L
6.02 x 1023
Atoms of element, or Molecules, or Formula units
Mole
Mass
molar mass g
Number of Atoms in
1 Compound Unit
The Mole Map Conversions
count subscripts # of atoms

9. The Mole Mall Conversions
Volume of Gas
(at STP)
_1 mol_
22.4 L
_22.4 L_
1 mol
_Molar mass_
1 mol
______1 mol______
6.02 x 1023 particles
Mass
Mole
Representative
Particles
atoms of element
formula units
molecules
___1 mol___
Molar mass
_6.02 x 1023 particles
1 mol
_____# of atoms____
1 molec (or form unit)
_1 molec (or form unit)_
# of atoms
The Mole Mall Conversions
Number of Atoms in formula