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I need help on how to solve a percent yield problem
A 45.1 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 12.3 grams. What was the percent iron in the sample of ore? Answer in units of %.
I did not take chemistry, but apparently these guys/gals did: http://www.docstoc.com/docs/426575/Stoichiometry—Mol-Factors-Calculations-with-Equations-Limiting-Reactions-Percent-Yield
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