The right option for the mass of CO2 produced by heating 20 g of 20% pure limestone is (Atomic mass of Ca = 40) [ CaCO3 ->[1200 K] CaO + CO2 ]

1. A. 1.12 g
2. B. 1.76 g
3. C. 2.64 g
4. D. 1.32 g

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