Post Utme Unn 2025 Chemistry Question 11

Practice objective / multiple choice question 11 from the 2025 Post Utme Unn Chemistry examination.

Post Utme Unn 2025 Chemistry Objective / Multiple Choice
Question 11 POST_UTME_UNN • 2025 • CHEMISTRY • objective

Determine the molar mass of a gas that occupies 2.5 L at 27°C and 1.2 atm. Use the ideal gas law to calculate the number of moles.

Answer Options

A. \( 2.5 , \text{L} \times 1.2 , \text{atm} \times 0.0821 , \text{L atm/mol K} \times 300 , \text{K} \)
Correct Answer B. \( 2.5 , \text{L} \times 1.2 , \text{atm} \times 0.0821 , \text{L atm/mol K} \times 300 , \text{K} \times 6.022 \times 10^{23} \)
C. \( 2.5 , \text{L} \times 1.2 , \text{atm} \times 0.0821 , \text{L atm/mol K} \times 300 , \text{K} \times 6.022 \times 10^{23} \times 4.184 , \text{J/g°C} \)
D. \( 2.5 , \text{L} \times 1.2 , \text{atm} \times 0.0821 , \text{L atm/mol K} \times 300 , \text{K} \times 6.022 \times 10^{23} \times 4.184 , \text{J/g°C} \times 10^{-3} , \text{kg/g} \)
Correct Answer
B
Correct Option:
\( 2.5 , \text{L} \times 1.2 , \text{atm} \times 0.0821 , \text{L atm/mol K} \times 300 , \text{K} \times 6.022 \times 10^{23} \)

About This Question

This is Post Utme Unn 2025 Chemistry Question 11. It is one of the objective questions from the 2025 Post Utme Unn Chemistry examination.

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