73. Solving a chemistry problem
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73. Solving a chemistry problem
42. After a series of operations, from a sample of 1.020 g of steel, the manganese contained in it was transferred to a solution in the form of MnO4-, which was titrated with 12.35 ml of a 0.100 N solution of a mixture of Na3AsO3 and NaNO2 reducing agents. Calculate the mass fraction of manganese in the alloy.
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