Answer:
The answer to your question is 2.51 moles of Fe₂O₃ will be formed.
Step-by-step explanation:
Data
Moles of Fe = 5.02
O₂ = excess
Moles of Fe₂O₃ = ?
Process
1.- Write the balanced chemical reaction
4Fe + 3O₂ ⇒ 2Fe₂O₃
Reactants Elements Products
4 Fe 4
6 O 6
2.- Calculate the moles of Fe₂O₃ when react 5.02 moles of Fe using proportions.
4 moles of Fe ---------------- 2 moles of Fe₂O₃
5.02 moles ---------------- x
x = (5.02 x 2) / 4
x = 10.04/4
x = 2.51 moles