Clackamas Community College
Clackamas Community College: Empirical Formulas
This site presents as explanation for calculating empirical formulas from composition data. Numerous examples are given, along with practice problems.
Texas A&M University
Texas A&m: Steps for Determining an Empirical Formula
The steps for determining an empirical formula are listed on this site. Also, it tells how to determine the molecular formula from an empirical formula. Two example problems are worked through step by step.
Towson University
Towson University: Determining Formulae
Explanation of how to calculate empirical and molecular formulas.
Iowa State University
Iowa State University: Empirical Formula of a Compound
Use this computer simulation to determine the amount of water in a crystalline solid hydrate.
Frostburg State University
Frostburg State University Chemistry Online: Polyatomic Ions
A good reference page for anyone studying polyatomic ions. Tables included on this page organize polyatomic ions by family and by charge. Information on naming compounds with polyatomic ions is also provided. There is a link to an online...
Chem Tutor
Chem Tutor: Basic Stiochiometry
Detailed discussion of stoichiometry, mols, and percents. Includes examples showing dimensional analysis (factor-lable method) and a link to the mole road map (a diagram which leads one through the stoichiometric problem-solving process).