Chemistry - the Complete Course Series, teaches students quantitative reasoning to solve chemistry problems. The 30 volume series covers all aspects of Chemistry from density to the mole, to molarity, stoichiometry and equilibrium. It demonstrates how to ask meaningful questions and conduct careful investigations to build knowledge of chemical and physical concepts and develop the skills to solve mathematical and scientific problems. In this program we are going to extend our study of stoichiometry to several additional types of problems. Even though this will increase the number of possible "types" of problems greatly, it really doesn't complicate things very much. All these different problems can be solved by using the same basic type of approach. This volume teaches the four "basic" types of stoichiometry problems can be represented by: moles-moles, grams-grams, moles-grams, grams-grams. To solve problems dealing with the volume of a gas at STP, molecules and energy. No "memorization" approach could be successful in learning how to solve these problems.