Practice question
Question
What is the mass of SO₃ produced when 16 g of SO₂ reacts with 8 g of O₂? (Molar masses: SO₂ = 64 g/mol, SO₃ = 80 g/mol, O₂ = 32 g/mol)
Explanation
Reaction: 2SO₂ + O₂ → 2SO₃. Moles: SO₂ = 0.25 mol, O₂ = 0.25 mol. 0.25 mol SO₂ produces 0.25 mol SO₃ = 0.25 × 80 = 20 g.
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