# Ferum oxide trivalent reacts with what volume of hydrogen if 25 grams of ferum is formed.

July 24, 2021 | education

| Let’s write down the solution:

1. Let’s compose the reaction equation:

Fe2O3 + 3H2 = 2Fe + 3H2O – redox reaction, iron is obtained;

2. Let’s define the molar masses of substances:

M (H2) = 2 g / mol;

M (Fe) = 55.8 g / mol;

3. Let us calculate the number of moles of Fe, if the mass is known:

Y (Fe) = m / M = 25 / 55.8 = 0.45 mol;

4. Let’s make the proportion using the given reaction equations:

X mol (H2) – 0.45 mol (Fe);

-3 mol -2 mol hence, X mol (H2) = 3 * 0.45 / 2 = 0.67 mol;

5. Determine the volume of hydrogen, applying Avogadro’s law:

V (H2) = 0.67 * 22.4 = 15 liters.

Answer: 15 liters of hydrogen is required to carry out the reaction.

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