Chemistry: Reference Web Sites & Mobile Apps

Includes a Chemistry Dictionary, Chemistry Tools, Resources and a discussion and help Forum

Calculates molecular weights from molecular formulas

Features data compiled and distributed by NIST under the Standard Reference Data Program, including thermochemical data for over 7000 organic and small inorganic compounds, heat of reaction data for over 8000 reactions, IR spectra for over 16,000 compounds, and mass spectra for over 15,000 compounds.

Periodic table with basic information on the elements

By Theodore Gray for iOS

Drug Reference

For iOS

For Android and iOS