The percentage of carbon in an organic compound is 80% ... – Chemistry

Chemistryhard · Past Paper

The percentage of carbon in an organic compound is 80% and hydrogen is 20%. What is its empirical formula?

ACH

BCH2

CCH3

DC2H5

✓ Correct Answer: C — CH3

Moles of C = 80/12 = 6.66. Moles of H = 20/1 = 20. Ratio H/C = 20/6.66 = 3. Empirical formula is CH3.

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