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Section 2: Formula Mass Chapter 7: Chemical Composition

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

Section 2: Formula

MassChapter 7: Chemical Composition

Page 2: Section 2: Formula Mass Chapter 7: Chemical Composition

Learning Goals0Calculate formula mass.

Page 3: Section 2: Formula Mass Chapter 7: Chemical Composition

Formula Mass0For any compound, the formula mass is the sum of the atomic masses of all the atoms in its chemical formula:

Page 4: Section 2: Formula Mass Chapter 7: Chemical Composition

Formula Mass0Like the atomic mass for atoms,

formula mass characterizes the average mass of a molecule or formula unit.

0H2O:0Formula mass = 2(1.01 amu) + 16.00 amu

= 18.02 amu

Page 5: Section 2: Formula Mass Chapter 7: Chemical Composition

Formula Mass0What is the formula mass of carbon tetrachloride?

0What is the formula mass of dinitrogen monoxide?


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