Question

how many isomers are for C6H14 and what are they?

Answer 1

There are 5 isomers for c6h14.They are
hexane
2-methyl pentane
3-methyl pentane
2-ethyl butane
2,3-dimethyl butane

Answer 2

There are five isomers of Hexane( C₆H₁₄ )

These are 

n - Hexane

2-Methyl pentane

3-Methyl pentane

2-Ethyl butane

2,3-Dimethyl butane