Chemistry spreadsheet calculator operates as a Java applet. It can balance any valid chemistry equation including ones with free electrons. It also has a balance simulator and 26 built-in chemistry equations for student practice. The spreadsheet performs dozens of stoichiometry problems such as limiting reagents, titrations, gravimetric analysis, ideal and non-ideal gases, many equilibrium problems including the determination of the equilibrium constant, deep coverage of partial pressure problems including ones with Van der Waal's gas equation. It solves many problems in various combinations and so it has a very large set of problems it can solve. Document shows 26 different examples or use.