24. Solving a chemistry problem
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3. Chromium contained in 1.87 g of technical chromite (FeO*Cr2O3) was oxidized to the hexavalent state (CrO42-). After acidification, 50 ml of 0.160 N Fe2+ solution was added to the solution, and 2.97 ml of 0.0500 N K2Cr2O7 solution was consumed. What is the % chromium content in the sample?
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