1. Section 2: Formula Mass Chapter 7: Chemical Composition

2. Learning Goals 0 Calculate formula mass.

3. Formula Mass 0 For any compound, the formula mass is the sum of the atomic masses of all the atoms in its chemical formula:

4. Formula Mass 0 Like the atomic mass for atoms, formula mass characterizes the average mass of a molecule or formula unit. 0 H2O: 0 Formula mass = 2(1.01 amu) + 16.00 amu = 18.02 amu

5. Formula Mass 0 What is the formula mass of carbon tetrachloride? 0 What is the formula mass of dinitrogen monoxide?