Give the necessary chemical equations and balance them.
Reaction of red hot iron with steam to give `Fe_3O_4`.

Explanation

To solve the problem of writing and balancing the chemical equation for the reaction of red hot iron with steam to produce \( \text{Fe}_3\text{O}_4 \), we can follow these steps:

### Step 1: Write the unbalanced chemical equation
The reaction involves red hot iron (Fe) and steam (H₂O). The products are magnetite, which is represented as \( \text{Fe}_3\text{O}_4 \), and hydrogen gas (H₂). Therefore, the unbalanced equation can be written as:

\[ \text{Fe} + \text{H}_2\text{O} \rightarrow \text{Fe}_3\text{O}_4 + \text{H}_2 \]
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