[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will learn to calculate the percent composition of a compound either from mass data or from the chemical formula. They will use...

[Free Registration/Login may be required to access all resource tools.] The following online tutorial helps students use Dalton's Law and mole fraction to calculate the partial pressure of a gas in a mixture. They will learn to calculate...

Read how to use molar mass equations to find conversion factors and molecular compounds. View several examples using given formulas for molar mass.

Listen and watch as this audio book shows the relations of molar mass and chemical compounds. Discover the formula for molecular mass, ionic compounds, and formula units, and view several pictures about chemical formulas.

The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section covers a variety of topics related to moles, including molecular weight and density...

[Free Registration/Login Required] In the mole carnival, students count the number of atoms and particles in different objects found at the carnival. As students work to find the number of particles, they practice counting particles by...

Determining empirical formula from analytical data, and determing molecular formula from empirical formula, with flow charts and sample calculations.

Explanation of how to calculate empirical and molecular formulas.

An introduction to the mole, a unit of measurement that quantifies atoms and molecules.

This site deals with Amedeo Avogadro, his life, his contributions to chemistry, and his famous number.

A very complete list of terms that are important to the study of gases. This resource is a web archive.

This online textbook chapter provides learners with advanced-level reading and practice material on stoichiometry