Neco 2024 Chemistry Question 42
Practice objective / multiple choice question 42 from the 2024 Neco Chemistry examination.
In the gas‑collection‑over‑water apparatus shown, 0.500 g of a solid metal carbonate \( \text{MCO}_{3} \) reacts with excess hydrochloric acid. The gas produced is collected over water at 25\,°C and a total pressure of 760 mm Hg. The volume of gas measured is 150 mL. The vapour pressure of water at 25\,°C is 23.8 mm Hg.\n\n(a) Calculate the corrected pressure of the dry gas.\n(b) Determine the number of moles of gas collected.\n(c) Assuming the reaction \( \text{MCO}_{3} + 2\text{HCl} \rightarrow \text{MCl}_{2} + \text{CO}_{2} + \text{H}_{2}\text{O} \) and that the collected gas is \( \text{CO}_{2} \), find the molar mass of the metal \( \text{M} \).
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About This Question
This is Neco 2024 Chemistry Question 42. It is one of the objective questions from the 2024 Neco Chemistry examination.
Difficulty level: Medium .
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