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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