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Iron metal reacts with oxygen gas to form rust, iron (III) oxide. Which of the following correctly shows the balanced equation for this reaction?

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2Fe + 3O2 --> 2Fe2O3

double replacement

2FE+3O2=2FE+2O3 so=2FE2O3

4FE(s)+3O(,2) (g) => 2Fe (,2) O (,3) (s).
Ps the ones with a comma and in parentheses are exponents that go on the bottom

4Fe + 3O2 --> 2FeO3

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