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Question 600062
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Mole Concept and Stoichiometry: Empirical Formula MCQ

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Empirical FormulaHardQuestion 600062

Question

Combustion of 0.3 g of a compound containing only C, H, and O gives 0.44 g CO₂ and 0.18 g H₂O. Its empirical formula is:
  1. A
    CH₂O
    Correct
  2. B
    CH₂
  3. C
    CH₃O
  4. D
    CHO

Correct answer

CH₂O

Explanation

The products contain 0.01 mol C and 0.02 mol H atoms. Their masses total 0.14 g, leaving 0.16 g O = 0.01 mol. The ratio C:H:O is 1:2:1, so the empirical formula is CH₂O.

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