MDCAT Chemistry MCQ #457

Analysis of a clear liquid reveals a composition of 40% carbon, 6.7% hydrogen, and 53.3% oxygen. Identify the empirical formula.

MDCAT Chemistry MCQ #457

  1. Question 1

    Q1. Analysis of a clear liquid reveals a composition of 40% carbon, 6.7% hydrogen, and 53.3% oxygen. Identify the empirical formula.

    • A) CH2O
    • B) C2H4O
    • C) C3H6O
    • D) C2H4O2

    Answer: CH2O

    Explanation: Dividing percentages by atomic masses gives a 1:2:1 ratio for C, H, and O. C2H4O is the formula for acetaldehyde.