Question

Butene would have__carbon atoms and a__bond.

Answer 1

Answer: four , double

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms. The general formula for these hydrocarbons is $C_nH_{2n+2}$

Unsaturated hydrocarbons are defined as the hydrocarbons which have double or triple covalent C-C bonds. They are known as alkenes and alkynes respectively. The general formula for these hydrocarbons is  $C_nH_{2n}$ and $C_nH_{2n-2}$

Butene is $CH_3CH_2CH=CH_2$ has molecular formula of $C_4H_8$ and thus has four carbon atoms and one double bond or pi bond.