[tex]\huge\bold\color{black}{⟨Answer⟩}[/tex]
Molecular weight = n × empirical weight, n represents the no. of atoms. ->So, molecular formula = (CH)n = (CH)6 =C6H6; in this case we substituted the calculated value of n. ->Therefore, the molecular formula of the compound having the molecular weight 78 g/mol is → (D) - C6H6.
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