Sachin has retrieved a lump of iron oxide (Fe2O?), and finds that its mass is 160.7 grams. How many moles of iron are in the lump?

Name: Sachin has retrieved a lump of iron oxide (Fe2O?), and finds that its mass is 160.7 grams. How many moles of iron are in the lump?
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Question

Quizplus · Accepted Answer

The molecular weight of iron oxide is about 160 grams per mole. Thus, 160.7 grams contains about 1 mole of iron oxide. However, there are 2 moles of iron in each mole of iron oxide. Thus, the answer is B, 2 moles.

Sachin Has Retrieved a Lump of Iron Oxide (Fe2O?), and Finds