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Question 600006
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Mole Concept and Stoichiometry: Empirical Formula MCQ

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Empirical FormulaEasyQuestion 600006

Question

A compound contains 40% C, 6.7% H, and 53.3% O by mass. Its empirical formula is:
  1. A
    CH₂O
    Correct
  2. B
    C₂H₄O₂
  3. C
    CHO
  4. D
    C₂H₂O

Correct answer

CH₂O

Explanation

Divide by atomic masses: C: 40/12 = 3.33; H: 6.7/1 = 6.7; O: 53.3/16 = 3.33. Ratio C:H:O = 1:2:1 → CH₂O.

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