When water vapor is passed over a hot iron, iron oscaline Fe2O4 and hydrogen are formed.

When water vapor is passed over a hot iron, iron oscaline Fe2O4 and hydrogen are formed. Write the chemical reaction equation, calculate the mass of consumed iron to obtain 2 m3 of hydrogen.

1. Let’s write the reaction equation:

3Fe + 4H2O = Fe3O4 + 4H2;

2.Calculate the chemical amount of hydrogen:

n (H2) = V (H2): Vm = 2000: 22.4 = 89.2857 mol;

3. Determine the amount and weight of iron:

n (Fe) = n (H2) * 3: 4 = 89.2857 * 3: 4 = 66.9643 mol;

m (Fe) = n (Fe) * M (Fe) = 66.9643 * 56 = 3750 g.

Answer: 3750