Give the structural molecular formula for 1,2-dimethyl pentane

The structural molecular formula for 1,2-dimethyl pentane is C7H16.

To determine the structural molecular formula for 1,2-dimethyl pentane, we first need to understand the basic structure of pentane, which is a straight-chain hydrocarbon with five carbon atoms.

The molecular formula for pentane is C5H12.

To indicate that it is 1,2-dimethyl pentane, we need to include two methyl groups (CH3) on the second carbon atom of the pentane chain.

So, the structural molecular formula for 1,2-dimethyl pentane is:

CH3-CH(CH3)-CH2-CH2-CH3