Question

Iron metal reacts with oxygen gas to produce iron(III) oxide. If you have 12.0 moles of iron, for complete reaction you need:

(HINT you need the balanced chemical reaction!)
A) 9.0 moles of O2 and produce 3.0 moles of Fe2O3
B) 9.0 moles of O2 and produce 6.0 moles of Fe2O3

Answers

4Fe + 3O2>> 2Fe2O3

Looks like a 3:2 ratio to me.

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