MDCAT Chemistry MCQ #4294

A mixture of gases contains 2 moles of N2 and 3 moles of O2. What is the partial pressure of N2 if total pressure is 5 atm?

MDCAT Chemistry MCQ #4294

  1. Question 1

    Q1. A mixture of gases contains 2 moles of N2 and 3 moles of O2. What is the partial pressure of N2 if total pressure is 5 atm?

    • A) 1 atm
    • B) 2 atm
    • C) 3 atm
    • D) 4 atm

    Answer: 2 atm

    Explanation: Partial pressure = mole fraction * total pressure. N2 mole fraction is 2/5, so P(N2) = 2 atm. Option A fails due to wrong mole fraction.