Practice question
Question
A mixture of 12 g C and 48 g O₂ is ignited to form CO₂. What is the mass of CO₂ produced? (Atomic masses: C = 12, O = 16)
Explanation
Reaction: C + O₂ → CO₂. Moles: C = 12/12 = 1 mol, O₂ = 48/32 = 1.5 mol. 1 mol C needs 1 mol O₂; 1 mol C reacts (limited by C). 1 mol CO₂ formed = 1 × 44 = 44 g.
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