The molecular formula for pentane is C5H12. It is an organic compound as well as a hydrocarbon. There are five atoms of carbon and twelve atoms of hydrogen present in one molecule of pentane. The molar mass of pentane is 72 grams per mole. There are three isomers of a pentane including, n-pentane, isopentane and neopentane. These isomers are also named as pentane, 2-methylbutane and 2,2-dimethylpropane. The structural representation of these isomers are;
CH3CH2CH2CH2CH3
CH3CHCH2CH3
CH3
and
CH3
CH3CHCH3
CH3
CH3CH2CH2CH2CH3
CH3CHCH2CH3
CH3
and
CH3
CH3CHCH3
CH3