Practice question
Question
A mixture of 8 g CH₄ and 32 g O₂ is ignited to form CO₂ and H₂O. What is the mass of CO₂ produced? (Atomic masses: C = 12, H = 1, O = 16)
Explanation
Reaction: CH₄ + 2O₂ → CO₂ + 2H₂O. Moles: CH₄ = 0.5 mol, O₂ = 1 mol. 0.5 mol CH₄ needs 1 mol O₂ (available). 0.5 mol CO₂ formed = 0.5 × 44 = 22 g.
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