Question

How many constitutional isomers are there with the molecular formula C5H12?

Answer 1

There are three constitutional isomers with the molecular formula C5H12.

Step-by-step explanation:

Constitutional isomers are compounds that have the same molecular formula but different structural formulas. To determine the number of constitutional isomers with the molecular formula C5H12, we need to consider the different ways the carbon atoms can be arranged in the molecule. In this case, there are three possibilities:

1. n-Pentane: straight chain with all single bonds.
2. 2-Methylbutane: branch chain with one methyl group.
3. 2,2-Dimethylpropane: branch chain with two methyl groups.

Therefore, there are three constitutional isomers with the molecular formula C5H12.