Neco 2017 Chemistry Question 13

Practice objective / multiple choice question 13 from the 2017 Neco Chemistry examination.

Neco 2017 Chemistry Objective / Multiple Choice Medium Difficulty
Question 13 NECO • 2017 • CHEMISTRY • objective
Neco 2017 Chemistry Question 13 diagram

In the apparatus shown, a reaction produces a gas that is collected over water. The graduated cylinder reads 125.0 mL of gas at 25\(^\circ\)C and atmospheric pressure of 760 mmHg. The vapor pressure of water at this temperature is 23.8 mmHg. Calculate the number of moles of dry gas collected (express your answer in scientific notation to two significant figures).

Answer Options

A. 3.8×10⁻³ mol
B. 4.9×10⁻⁴ mol
C. 5.1×10⁻³ mol
Correct Answer D. 4.9×10⁻³ mol
Correct Answer
D
Correct Option:
4.9×10⁻³ mol

About This Question

This is Neco 2017 Chemistry Question 13. It is one of the objective questions from the 2017 Neco Chemistry examination.

Difficulty level: Medium .

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