3. Mass of a Mole of an Element
Molar mass is the mass in grams of one mole of a representative particle
The atomic mass in grams is the mass of one mole of an element
For a compound, add the atomic masses in grams of each of the elements together. This is the mass in grams of one mole of a compound.

5. Examples Write the molar mass of the following:Na C
H2O
PCl3
H2O2
What is the mass of 2.00 moles of HCl?

6. Mole-Mass Relationship
Find the mass in grams of the following:
9.45 mol of Al2O3
4.52 x 10-3 mol C20H42
2.50 mol of iron (II) hydroxide

7. Mole-Mass Relationship
Find the amount in moles of the following:
92.2 g of Fe2O3
3.70 x 10-1 g of boron
75.0 g of dinitrogen trioxide