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What is the mass percent iron in the sample if

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All of the iron in 1.734 g of an iron sample is converted into Fe2 which was then titrated with dichromate:14H1 Cr2O72- 6Fe2 -> 6Fe3 2Cr3 7H2OWhat is the mass percent iron in the sample if 29.65 mL of 0.10682 M K2Cr2O7 were required to reach the equivalence point?

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