Chemistry - Stoichiometry - Limiting reagent concept - Finding the Limiting Reagent

Worked example for Grade 11. Problem: '10g of H₂ reacts with 32g of O₂. Which is limiting? 2H₂ + O₂ → 2H₂O.' Step 1: Convert both to moles. 10g H₂ ÷ 2 = 5 mol H₂. 32g O₂ ÷ 32 = 1 mol O₂. Step 2: Use mole ratio to check. Need: 2 mol H₂ : 1 mol O₂. Have: 5 mol H₂ : 1 mol O₂. If we use all O₂: need 2 m