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If 10 g of CaCO₃ is decomposed completely, what volume of CO₂ is produced at STP?

2.24 L

4.48 L

1.12 L

6.72 L

option1

CaCO₃ → CaO + CO₂. Molar mass = 100 g/mol. 1 mole (100 g) produces 22.4 L CO₂. 10 g produces (10/100) × 22.4 = 2.24 L.