Iron reacts with atmospheric oxygen to form iron oxide or ferric oxide. Look at the chemical equation for this reaction: Fe + O2 → Fe2O3 This equation is unbalanced. Which of the following is the correct balanced equation for this reaction?
4Fe + 3O2 → 2Fe2O3
3Fe + 4O2 → 2Fe2O3
2Fe + 4O2 → 3Fe2O3
3Fe + 3O2 → 4Fe2O3
4Fe + 4O2 → 3Fe2O3
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