23. Solving a chemistry problem
📂 Coursework
👤 Derkach
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6. A mixture of iron oxide (II) and iron oxide (III) weighing 8 g was dissolved in an excess of sulfuric acid. The resulting solution reacted with a solution of KMnO4, concentration 5%, mass 31.6 g. Find the mass fractions of oxides in the initial mixture.
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