Texas Education Agency
Texas Gateway: Empirical Formula
This tutorial reviews how to calculate molecular formula by giving students video, exercises, and practice.
Towson University
Towson University: Determining Formulae
Explanation of how to calculate empirical and molecular formulas.
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.
CK-12 Foundation
Ck 12: Plix Series: Percent Composition
[Free Registration/Login Required] Manipulate graph data to see a representation of the percent composition of different compounds. Then answer a challenge question about the activity.
Frostburg State University
General Chemistry: Percent Compound in a Mixture
Resource contains and example problem and solution of how to compute percent compound within a mixture when given the mixture's mass and element percents.
Upper Canada District School Board
Tom Stretton's Advanced Placement Chemistry: Stoichiometry
This online textbook chapter provides learners with advanced-level reading and practice material on stoichiometry