Neco 2023 Chemistry Question 45

Practice objective / multiple choice question 45 from the 2023 Neco Chemistry examination.

Neco 2023 Chemistry Objective / Multiple Choice Medium Difficulty
Question 45 NECO • 2023 • CHEMISTRY • objective

In the apparatus shown, 250.0\,mL of an unknown gas is collected over water at 25\,\(^\circ\)C and a total pressure of 760\,mm\,Hg. The water vapor pressure at this temperature is 23.8\,mm\,Hg. Calculate the number of moles of the dry gas collected. Give your answer in scientific notation with three significant figures.

Answer Options

A. 1.06×10⁻² mol
Correct Answer B. 9.91×10⁻³ mol
C. 1.02×10⁻² mol
D. 8.97×10⁻² mol
Correct Answer
B
Correct Option:
9.91×10⁻³ mol

About This Question

This is Neco 2023 Chemistry Question 45. It is one of the objective questions from the 2023 Neco Chemistry examination.

Difficulty level: Medium .

View More Neco 2023 Chemistry Questions More Neco 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