Question
What is the molecular formula and structural formula of a cyclic hydrocarbon whose one molecule contains 8 hydrogen atoms?
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Answer
The molecular formula of a cyclic hydrocarbon is $C _4 H _8$, as it satisfies the general formula of a cyclic hydrocarbon, i.e. $C _n H _{2 n}$. Here, the number of hydrogen atoms is already given as 8 , i.e. $2 n=8$. Therefore, $n=\frac{8}{2}=4$. Here, $n$ represents the number of carbon atoms. Therefore, the molecular formula is $C _4 H _8$. The structural formula of the cyclic hydrocarbon $C _4 H _8$ is as follows:
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