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 morality, 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 consider the amount of space, or volume occupied by a mole of any gaseous substance. Avogadro's Hypothesis states that at the same conditions of temperature and pressure, equal volume of different gases contain the same number of molecules. This volume teaches the volume occupied by a mole of a substance is referred to as it's molar volume. A mole of any gas at STP occupies a volume of 22.41 Liters. In solving Molar Volume problems the important quantities are moles, grams, molecules, and Liters & the most common "this per that's" are grams/mole, molecules/mole and Liters/mole.