Waec Model Questions Vol1 2019 Chemistry Question 40
Practice objective / multiple choice question 40 from the 2019 Waec Model Questions Vol1 Chemistry examination.
A 5.0 g sample of potassium chlorate (KClO₃) is heated to decompose according to 2 KClO₃ → 2 KCl + 3 O₂. The oxygen gas is collected over water at 25 °C and 750 mmHg; the vapour pressure of water at this temperature is 23.8 mmHg. The volume of dry O₂ collected is 1.20 L. Determine the mass of potassium chloride (KCl) formed.
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About This Question
This is Waec Model Questions Vol1 2019 Chemistry Question 40. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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