Percent Composition By Mass

This chemistry video tutorial explains how to find the percent composition by mass of each element in a compound using a simple formula. You need to find the molar mass of the entire compound in order to calculate the mass percent of each element. This video contains plenty of examples and practice problems.

Stoichiometry - Free Formula Sheet:

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Introduction to Moles:

How To Calculate the Molar Mass:

How To Convert Grams to Moles:

How To Convert Moles to Grams:

Moles to Atoms Conversion:

Grams to Molecules Conversion:

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Grams to Atoms:

Moles, Atoms, & Grams Conversions:

How To Balance Chemical Equations:

Stoichiometry - Basic Introduction:

Avogadro's Number:

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Limiting Reactant Problems:

Excess Reactant Problems:

Theoretical & Percent Yield:

Percent Yield - More Examples:

Percent Error:

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Percent Composition by Mass:

Empirical Formula Problems:

Empirical Formula - Hydrated Compounds:

Combustion Analysis:

Stoichiometry Practice Test:

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Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

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