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The Catalyst Chemistry Resources for Teachers

For Teachers 9th - 10th
This site directs teachers to relevant information for use in the teaching of chemistry. The site's content includes projects, demos, labs and activities, and more.
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Oswego City School District

Regents Exam Prep Center: Moles & Stoichiometry: Moles Resource

For Students 9th - 10th
A nice page of links to follow for learning about moles. Contains links to sites that have explanations of moles and molar mass, practice problems, and more.
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Frostburg State University

General Chemistry Online: Limiting Reactant Problem

For Students 9th - 10th
Explains the essence of limiting reactant problems using a sample problem: How can an amount of product (KNO3) be predicted from amounts for two reactants (KCl and HNO3)? Shows the work and explains how to solve these types of problems.