A hydrocarbon contains 20% hydrogen by mass. The empirical formula of the compound is:

C H

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C_{2} H_{3}

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{C H}_{2}

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{C H}_{3}

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Solution

The correct option is D ${C H}_{3}$
Let the mass of hydrocarbon be $100 g$
Therefore , $H = 20 g = 20$ moles
$C = 80 g =$ $\frac{80}{12}$ moles = $6.67$ moles
$C : H = 6.67 : 20 = 1 : 3$
Therefore, the empirical formula of hydrocarbon is $C H_{3}$

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A hydrocarbon contains 20% hydrogen by mass. The empirical formula of the compound is:

The correct option is D CH3Let the mass of hydrocarbon be 100gTherefore , H=20g=20 moles C=80g= 8012 moles =6.67 molesC:H=6.67:20=1:3Therefore, the empirical formula of hydrocarbon is CH3

The correct option is D ${C H}_{3}$
Let the mass of hydrocarbon be $100 g$
Therefore , $H = 20 g = 20$ moles
$C = 80 g =$ $\frac{80}{12}$ moles = $6.67$ moles
$C : H = 6.67 : 20 = 1 : 3$
Therefore, the empirical formula of hydrocarbon is $C H_{3}$