Answer to Question #311953 in Chemistry for Beng

Question

If 3.00 moles of H2O are produced, hoe many of moles of oxygen must be consumed?

Answer 1

Solution:

Balanced chemical equation:

2H₂ + O₂ → 2H₂O

According to stoichiometry:

1 mol of O₂ produces 2 mol of H₂O

X mol of O₂ produces 3 mol of H₂O

Thus,

Moles of O₂ = X = (3 mol H₂O) × (1 mol O₂ / 2 mol H₂O) = 1.5 mol O₂

Moles of O₂ = 1.5 mol

Answer: 1.5 moles of oxygen (O₂) must be consumed