111. Solving a chemistry problem
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111. Solving a chemistry problem
63. A sample of 1.7950 g of ore was transferred into solution, iron was reduced to Fe2 and brought to 250.00 ml. For titration of 20.00 ml of the solution, 18.65 ml of potassium dichromate with a titer of 0.002857 were used. Calculate the percentage of iron in the sample.
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