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. There are only a handful of important ideas that must be mastered in order to be successful at solving chemistry problems. When you are presented with a problem, you should try to thoroughly understand what is represented by the numbers in the problem and what the problem is asking before you ever start to try and obtain the answer. This volume teaches the "numbers" in a problem are generally of two types. "amounts", and "this per that". Whenever you divide two numbers, you are making the denominator "one".