The empirical formula of a compound is $C H$ . Its molecular weight is 78. The molecular formula of the compound will be:

C_{2} H_{2}

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C_{3} H_{3}

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C_{4} H_{4}

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C_{6} H_{6}

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Solution

The correct option is D $C_{6} H_{6}$
The empirical formula of a compound is $C H$ . Its empirical weight is 13.
Empirical mass $\times$ n $=$ molecular weight
$n = 6$
Molecular formula $= (E m p i r i c a l f o r m u l a)_{n} = C_{6} H_{6}$

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