Fe3o4 + h2 ⟶ fe + h2o, identify the coefficient of h2o in the balanced equation.

Balance Fe
Fe3O4 + H2→ 3Fe + H2O
Balance O
Fe3O4 + H2→ 3Fe + 4H2O
Balance H
Fe3O4 + 4H2→ 3Fe+4H2O
Coeff of H2O=4

Where is the following?

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