Waec Model Questions Vol1 2022 Chemistry Question 5
Practice objective / multiple choice question 5 from the 2022 Waec Model Questions Vol1 Chemistry examination.
When 12.0 g of calcium carbonate is heated, it decomposes: CaCO₃ → CaO + CO₂. The CO₂ is collected over water at 30 °C and 740 mmHg; the water vapour pressure at this temperature is 31.8 mmHg and the measured dry CO₂ volume is 2.80 L. After cooling, 5.80 g of CaO is recovered. Calculate the percent yield of CaO.
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About This Question
This is Waec Model Questions Vol1 2022 Chemistry Question 5. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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