1. Calculating Molar Mass and Converting using Molar Mass

2. Molar Mass Molar Mass: the mass of one mole of a pure substance.
Calculating Molar Mass:
Locate the weight on the periodic table
Round to the nearest whole number
If there are multiple elements, add the weights of each element together.
Treat each element in a polyatomic separately.

3. Examples B: P:
CO2:
LiNO3:

4. Converting Using Molar Mass
Grams to moles
Determine the molar mass of the element or compound
Divide by the molar mass of the element or compound
How many moles are in 196 grams of Ca?
How many moles are in 422g of NaOH?

5. Converting Using Molar Mass
Moles to grams
Determine the molar mass of the element or compound
Multiply by the molar mass of the element or compound
How many grams are in 6.92 moles of RbNO3?
How many grams are in moles of MgCl2?