MDCAT Chemistry MCQ #4537

What is the molecular mass of a hydrocarbon that produces 3 moles of CO₂ and 4 moles of H₂O per mole when burned?

MDCAT Chemistry MCQ #4537

  1. Question 1

    Q1. What is the molecular mass of a hydrocarbon that produces 3 moles of CO₂ and 4 moles of H₂O per mole when burned?

    • A) 44 g/mol
    • B) 58 g/mol
    • C) 72 g/mol
    • D) 86 g/mol

    Answer: 72 g/mol

    Explanation: 3 C atoms and 8 H atoms → C₃H₈ (propane). Mass = 44 + 8 = 52? Wait, 3×12 + 8×1 = 44? No, correct is 44 + 8 = 52? Distractor B miscalculates.