Waec Model Questions Vol1 2021 Chemistry Question 40
Practice objective / multiple choice question 40 from the 2021 Waec Model Questions Vol1 Chemistry examination.
Sodium nitrate decomposes on heating according to the equation: 2 NaNO₃ → 2 NaNO₂ + O₂. A 10.0 g sample of NaNO₃ is heated, and the oxygen gas produced is collected over water at 30 °C and a total pressure of 760 mm Hg. The water vapour pressure at this temperature is 31.8 mm Hg and the volume of the collected gas is 1.50 L. Calculate (i) the number of moles of O₂ actually collected, (ii) the theoretical moles of O₂ that could be produced from the sample, and (iii) the percent yield of O₂.
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About This Question
This is Waec Model Questions Vol1 2021 Chemistry Question 40. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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