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Solution: A mixture contains only NaCl and Fe(NO 3)3. A 0.456-g sample...

Question

A mixture contains only NaCl and Fe(NO 3)3. A 0.456-g sample of the mixture is dissolved in water, and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is filtered, dried, and weighed. Its mass is 0.107 g. Calculate the following. 

c. the mass percent of Fe(NO 3)3 in the sample