4. Solving a chemistry problem
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4. Solving a chemistry problem
2. Determine the mass fraction of potassium dichromate in the technical product, if a sample weighing 0.1 g was taken for analysis and 2.6 mmol of Fe2 solution was added to its solution, 12.0 ml of KMnO4 with a concentration of C (1 / z) = 0.1 mol/L.
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