Neco 2025 Physics Question 17

Practice objective / multiple choice question 17 from the 2025 Neco Physics examination.

Neco 2025 Physics Objective / Multiple Choice Medium Difficulty
Question 17 NECO • 2025 • PHYSICS • objective

A mixture of two ideal gases A and B is confined in a 10.0 L container at 300 K and total pressure 1.00 atm. Gas A effuses through a small hole twice as fast as gas B. The partial pressure of gas A is 0.30 atm. The molar mass of gas B is 32 g mol\(^{-1}\). (a) Find the molar mass of gas A. (b) Determine the mole fraction of gas B in the mixture.

Answer Options

Correct Answer A. M_A = 8 g/mol; mole fraction of B = 0.70
B. M_A = 12 g\/mol; mole fraction of B = 0.60
C. M_A = 8 g\/mol; mole fraction of B = 0.30
D. M_A = 16 g\/mol; mole fraction of B = 0.70
Correct Answer
A
Correct Option:
M_A = 8 g/mol; mole fraction of B = 0.70

About This Question

This is Neco 2025 Physics Question 17. It is one of the objective questions from the 2025 Neco Physics examination.

Difficulty level: Medium .

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