How many moles of oxygen react with hydrogen to produce 1.85 mol of water?

Question

Balanced equation: 2H2 + O2 --> 2H2O

Answer 1

From the balanced chemical reaction, 2 moles of H₂O is formed from 1 mole of O₂. The mole ratio is 2:1. Use the mole ratio for the stoichiometry conversion.

1.85 mol H₂O x (1 mol O₂ / 2 mol H₂O) = 0.925 mol O₂

Similarly, 2 moles of H₂O is formed from 2 moles of H₂. The mole ratio is 2:2.

1.85 mol H₂O x (2 mol H₂ / 2 mol H₂O) = 1.85 mol H₂