L04_A
3.1  Counting by Weighing
3.2  Atomic Masses
3.3  The Mole
3.4  Molar Mass
3.5  Learning to Solve Problems
3.6  Percent Composition of Compounds
3.7  Determining the Formula of a Compound
3.8  Chemical Equation

L04_B
3.1  Counting by Weighing
3.2  Atomic Masses
3.3  The Mole
3.4  Molar Mass
3.5  Learning to Solve Problems
3.6  Percent Composition of Compounds
3.7  Determining the Formula of a Compound
3.8  Chemical Equation