Calculating Empirical Formulas of Compounds

Calculating Empirical Formulas of Compounds - 4. Change the...

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Name_____________________________________________ Calculating empirical formulas of compounds Example:What would be the empirical formula for a compound that contains 32.38% Na, 22.65% S, and 44.99% O 1. Assume you have 100grams. So convert the percentages to grams 2. Convert from grams to moles by dividing by molar mass. 3. Change moles into a ratio by dividing by the smallest quantity
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Unformatted text preview: 4. Change the ratio into whole numbers by multiplying all ratios by same factor. Problem: Rubbing alcohol indicates that it is 60.0% C, 13.4% H, and 26.6% O. What is its empirical formula? Determine the empirical formula for a compound that is 56.6% K, 8.7% C, and 34.7% O. An oxide is 69.9% Fe and 30.1% O, What is its empirical formula?...
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This note was uploaded on 10/04/2010 for the course CHEM 145 taught by Professor Prezhdo during the Fall '08 term at University of Washington.

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Calculating Empirical Formulas of Compounds - 4. Change the...

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