21. Solving a chemistry problem
92. 1.7950 g of iron ore was dissolved, iron ions were reduced, the solution was diluted in a volumetric flask to a volume of 250 cm3. For titration of 20 cm3 of this solution, 18.65 cm3 of a potassium permanganate solution with a titer T = 0.001842 g/cm3 is consumed. What percentage of Fe is in the sample?
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