MDCAT Chemistry MCQ #2813

A gas mixture has 0.25 mol N₂ and 0.75 mol O₂. What is O₂’s partial pressure if total pressure is 1.0 atm?

MDCAT Chemistry MCQ #2813

  1. Question 1

    Q1. A gas mixture has 0.25 mol N₂ and 0.75 mol O₂. What is O₂’s partial pressure if total pressure is 1.0 atm?

    • A) 0.75 atm
    • B) 0.25 atm
    • C) 0.50 atm
    • D) 1.0 atm

    Answer: 0.75 atm

    Explanation: Partial pressure = 0.75/(0.25+0.75)×1.0 = 0.75 atm. C assumes equal moles.