A compound consists of 80% Carbon and 20% Hydrogen by mass. What is its empirical formula? (Ar: C=12, H=1)
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CH₂
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CH₃
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CH₃
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C₂H₆
📝 Detailed explanation
Moles C = 80/12 = 6.67. Moles H = 20/1 = 20.
Ratio C:H = 6.67 : 20. Divide by 6.67 -> 1 : 3.
Empirical formula is CH₃.
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