Lots of points^^

1. what is an isomer? how many possible isomers of hexane are there? what are the structural differences between these isomers?

1. An isomers, are molecules with the same chemical formula but different structural formula.

2. Isomers of hexane are skeletal isomers. They have the same chemical formula (C₆H₁₄) but have different carbon chain and different chemical properties.
There are five isomers of hexane.

Look at the attachment :)