MDCAT Chemistry MCQ #2789

How many molecules are present in 0.25 moles of ammonia (NH₃)?

MDCAT Chemistry MCQ #2789

  1. Question 1

    Q1. How many molecules are present in 0.25 moles of ammonia (NH₃)?

    • A) 1.5 × 10²³
    • B) 2.4 × 10²³
    • C) 3.0 × 10²³
    • D) 6.022 × 10²³

    Answer: 1.5 × 10²³

    Explanation: 0.25 × 6.022 × 10²³ = 1.5 × 10²³. Option C uses Avogadro’s number directly.