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Practice question

MCQ

Question

A compound contains 52.17% carbon, 13.04% hydrogen, and 34.78% oxygen by mass. What is its empirical formula? (Atomic masses: C = 12, H = 1, O = 16)

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Explanation

For 100 g: C = 52.17 g, H = 13.04 g, O = 34.78 g. Moles: C ≈ 4.35, H ≈ 13.04, O ≈ 2.17. Ratio = 2 : 6 : 1; empirical formula = C₂H₆O.

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