MDCAT Chemistry MCQ #706

A sample of methyl chloride is analyzed for elemental composition. What is the approximate percentage by mass of carbon in this alkyl halide?

MDCAT Chemistry MCQ #706

  1. Question 1

    Q1. A sample of methyl chloride is analyzed for elemental composition. What is the approximate percentage by mass of carbon in this alkyl halide?

    • A) 12.00%
    • B) 23.76%
    • C) 5.94%
    • D) 70.30%

    Answer: 23.76%

    Explanation: Molecular mass of CH3Cl is 50.5; Carbon (12) percentage is (12/50.5)*100 = 23.76%. Option C is the percentage of hydrogen by mass.