If 3 moles of O2 react according to 2 H2 + O2 → 2 H2O, how many moles of H2 are required?

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Multiple Choice

If 3 moles of O2 react according to 2 H2 + O2 → 2 H2O, how many moles of H2 are required?

The key idea is using the mole ratio from the balanced equation. The equation shows that 2 moles of hydrogen react with 1 mole of oxygen. So for every 1 mole of O2, you need 2 moles of H2. If you have 3 moles of O2, multiply by 2 to get 6 moles of H2. Therefore, 6 moles of hydrogen are required.

The key idea is using the mole ratio from the balanced equation. The equation shows that 2 moles of hydrogen react with 1 mole of oxygen. So for every 1 mole of O2, you need 2 moles of H2. If you have 3 moles of O2, multiply by 2 to get 6 moles of H2. Therefore, 6 moles of hydrogen are required.

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