By heating 25g of limestone (CaCO3) , the weight of carbon dioxide produced is:
Correct answer: C. 11 g
- A. 14 g
- B. 71 g
- C. 11 g
- D. 2 g
- E. 10 g
Explanation
Limestone is primarily composed of calcium carbonate (CaCO3). When heated, it decomposes according to the reaction:CaCO3 --> CaO + CO2From the stoichiometric relationship, 100g of CaCO3 decomposes to produce 44g of CO2. Therefore, for 25g of CaCO3, the amount of CO2 produced is calculated as follows:(25g CaCO3 / 100g CaCO3) * 44g CO2 = 11g CO2Thus, the correct answer is 11g. Other options either overestimate or underestimate this calculated mass based on incorrect stoichiometric assumptions.
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