The general formula of a homologues series of carbon compounds is CnH2n. Write the molecular formulae of the second and fourth members of the series.
The general formula of homologues series of alkenes is CnH2n. The molecular formula of second member of alkenes series is C3H6. The second member of alkenes series contains three carbon atoms.

The molecular formula of fourth member of alkenes series is C5H10.


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