Waec Model Questions Vol1 2025 Chemistry Question 36
Practice objective / multiple choice question 36 from the 2025 Waec Model Questions Vol1 Chemistry examination.
In the laboratory setup shown, magnesium metal reacts with excess hydrochloric acid in a flask, and the hydrogen gas produced is collected over water in an inverted graduated cylinder. The volume of gas collected is 112.0 mL at 25 °C and a total pressure of 760 mm Hg. The water vapour pressure at 25 °C is 23.8 mm Hg. Using the diagram of the apparatus, calculate the mass of magnesium that reacted. (M(Mg)=24.3 g mol⁻¹)
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This is Waec Model Questions Vol1 2025 Chemistry Question 36. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Medium .
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