You Heat 3

question 96

Multiple Choice

You heat 3.854 g of a mixture of Fe₃O₄ and FeO to form 4.148 g Fe₂O₃.The mass percent of FeO originally in the mixture was:

• A)92.9%
• B)55.8%
• C)44.2%
• D)38.5%
• E)none of these

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