Regents Prep: Chemistry
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2g. Moles/Stoichiometry: Per Cent Composition Resources

Empirical and Molecular Formulas (CHEMystery)
A quick explanation of how to find the percent of an element in a compound. Also included are definitions of molecular and empirical formulas, and how to find the molecular formula of a compound.

Percentage Composition (Internet Science Room)
Examples and links to practice problems.



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