1. Write the balanced chemical equation:

2 H₂ + O₂ → 2 H₂O

2. Convert grams of O₂ to moles:

* Molar mass of O₂ = 32 g/mol

* Moles of O₂ = (355 g O₂) / (32 g/mol) = 11.09 mol O₂

3. Use the mole ratio from the balanced equation:

* The balanced equation shows that 1 mole of O₂ produces 2 moles of H₂O.

4. Calculate moles of H₂O:

* Moles of H₂O = (11.09 mol O₂) * (2 mol H₂O / 1 mol O₂) = 22.18 mol H₂O

Therefore, 355 g of O₂ will produce 22.18 moles of H₂O.