Question Detail
Question
What mass of O₂ reacts with 96.1 g of propane (C₃H₈) based on the stoichiometry: C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Molar mass C₃H₈ = 44.1 g/mol. Moles C₃H₈ = 96.1 g / 44.1 g/mol = 2.18 mol. From equation, 1 mol C₃H₈ reacts with 5 mol O₂, so moles O₂ = 2.18 mol × 5 = 10.9 mol. Mass O₂ = 10.9 mol × 32.0 g/mol = 348.8 g ≈ 349 g.
Hint
Calculate moles of propane, use the mole ratio to find moles of oxygen, then convert to mass.