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Which of these equations shows rust, Fe2O3, forming when oxygen, O2, reacts with iron, Fe?


2Fe2O3 + 4Fe → 3O2



4Fe → 3O2 + 2Fe2O3


3O2 + 4Fe → 2Fe2O3


2Fe2O3 → 3O2 + 4Fe

User Petunia
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2 Answers

4 votes

Answer:

4Fe → 3O2 + 2Fe2O3

Step-by-step explanation:

We see that the equation balances

There are 4 atoms of Iron (Fe) on the left and 2*2 = 4 on the right.

3 * 2 = 6 of oxygen on the left and 2 * 3 = 6 on the right.

User Jolean
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5.9k points
4 votes

Answer:

3

Step-by-step explanation:

If oxygen reacts with iron, then both must be reactants and rust the product of that reaction