Gce Model Questions Vol1 2024 Chemistry Question 32

Practice objective / multiple choice question 32 from the 2024 Gce Model Questions Vol1 Chemistry examination.

Gce Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Medium Difficulty
Question 32 GCE_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective
Gce Model Questions Vol1 2024 Chemistry Question 32 diagram

In the apparatus shown, 0.120 g of magnesium ribbon is placed in excess hydrochloric acid. The hydrogen gas produced is collected over water at 25 °C, and the gas syringe reads 45.0 mL. The atmospheric pressure is 760 mm Hg and the vapour pressure of water at 25 °C is 23.8 mm Hg. (a) Calculate the number of moles of dry hydrogen gas collected. (b) Calculate the theoretical number of moles of hydrogen that could be produced from the magnesium. (c) Determine the percentage yield of the reaction, giving your answer to the nearest whole percent.

Answer Options

A. (a) 2.05×10⁻³ mol; (b) 5.10×10⁻³ mol; (c) 40 %
B. (a) 1.90×10⁻³ mol; (b) 5.20×10⁻³ mol; (c) 38 %
C. (a) 1.60×10⁻³ mol; (b) 4.50×10⁻³ mol; (c) 35 %
Correct Answer D. (a) 1.79×10⁻³ mol; (b) 4.94×10⁻³ mol; (c) 36 %
Correct Answer
D
Correct Option:
(a) 1.79×10⁻³ mol; (b) 4.94×10⁻³ mol; (c) 36 %

About This Question

This is Gce Model Questions Vol1 2024 Chemistry Question 32. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

View More Gce Model Questions Vol1 2024 Chemistry Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support