A chemist studies two forms of refined gasoline. which of the following branches of chemistry might the chemist us?

The branch of chemistry that the chemist might use will be the branch of organic chemistry. This is because gasoline is an organic compound. We can say that a compound is organic if it contains a carbon atom. Gasoline is composed of long chains of alkanes (hydrocarbons with single bonds) ranging from 4 carbon atoms to 12 carbon atoms.