A sample of a compound consisting only of $C$ and $H$ is burned with oxygen and yields $13\mathrm{.}20g$

$CO2$ and $6\mathrm{.}306gH2O.$ The molar mass of the compound is $86\mathrm{.}17\frac{g}{m}ol.$ Give the molecular for$-$

mula and a possible structural formula of the compound.