Question

The molecules of the alkene family are represented by a general formula C_nH_2n. Answer the following:

What is the structural formula of the third member of the alkene family? 

Answer 1

First member of alkene family C₂H₄

The molecular formula is C₂H₄

∴ Mol. formula of third member C₄H₈

The third member of the alkene family is butene. Its structural formula is shown below:

\[\begin{array}{cc}
\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\ce{H}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\ce{H - C - C = C - C - H}\\
|\phantom{....}|\phantom{.........}\\
\ce{H}\phantom{...}\ce{H}\phantom{.........}
\end{array}\]