Waec Model Questions Vol1 2020 Chemistry Question 5
Practice objective / multiple choice question 5 from the 2020 Waec Model Questions Vol1 Chemistry examination.
In the apparatus shown, solid magnesium reacts with excess hydrochloric acid to produce hydrogen gas collected over water. The volume of gas collected is 125.0 mL at 298 K. Atmospheric pressure is 760 mmHg and the water‑vapour pressure at this temperature is 23.8 mmHg. The mass of the dry magnesium used is 0.150 g. Calculate the percent yield of hydrogen gas based on the theoretical amount expected from the reaction Mg + 2 HCl → MgCl₂ + H₂.
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About This Question
This is Waec Model Questions Vol1 2020 Chemistry Question 5. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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