The upgrade of CHEMiCALC for the Palm OS now includes a stoichiometry calculator. This patented chemical calculator will save chemists and chemistry students time and reduce errors for many routine chemical calculations. Use and explore the Element Properties database and graph periodic trends of any one of 18 element properties. Write a chemical formula by tapping directly on the element symbols in the on-screen periodic table, and on the digits and other symbols. The program automatically handles subscripts. Then tap on the "Analyze" button to calculate the formula weight, condensed formula, % composition or weight percentage. Write and balance chemical equations, even if more than one solution is possible. The version 2.2 upgrade now includes a Stoichiometry Calculator for Mass/Mole or Solution calculations. Menu- Help is available. Also includes a minor fix for Element Graphing for PalmOS 5. We welcome your suggestions. Contact the inventor, Bert Ramsay at Bert@chemicalc.com.