In \( a 240 \mathrm{~g} \) mixtuke of \( \mathrm{FeO} \) and \( \mathrm{Fe}_{2} \mathrm{O}_{3} \...

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In \( a 240 \mathrm{~g} \) mixtuke of \( \mathrm{FeO} \) and \( \mathrm{Fe}_{2} \mathrm{O}_{3} \) mole fraction of \( \mathrm{FeO} \) is 0.8 mass of \( \mathrm{Fe}_{2} \mathrm{O}_{3} \) in this mixture should be?
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