How many moles of iron would have been used up if 48.0 g of copper were...
Homework Answers
Equatuion of reaction between Fe and Cu:
Cu2+ + Fe 
Fe2+ + Cu
Moles of Cu = mass / molar mass = 48 / 63.5 = 0.756 moles
From the equation, moles of Fe = moles of Cu = 0.756 moles which is the answer you're looking for
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