This worksheet is an excellent review of gas laws. It includes practice problems on the following topics: combined gas law (including Boyle's Law, Charles' Law, and Gay-Lussac's Law), the ideal gas law, gas stoichiometry, and conceptual gas scenarios). Includes problems at STP (standard temperature and pressure) and non-STP questions. The end of the worksheet also includes four standardized test questions related to gas laws. This is an excellent preview, overview, or review for a gas unit!