This document provides an overview of key concepts and equations related to gases in chemistry. It defines gas laws and the kinetic molecular theory, including assumptions like molecules having negligible volume. Common gas laws are described, such as Boyle's, Charles', Dalton's and the combined gas law. Equations are provided for ideal and real gases. The document also covers gas stoichiometry, effusion, diffusion, and Graham's laws relating molecular mass to rates of effusion and diffusion. Strategies are suggested for attacking gas law problems by identifying quantities, writing knowns and unknowns symbolically, choosing the appropriate equation, and solving.