Name the haloalkane that has 7 carbons in a chain, a chlorine on the second carbon, and a bromine on the third carbon.

Answer is: name of haloalkane that has 7 carbons in a chain, a chlorine on the second carbon, and a bromine on the third carbon is 2-chloro-3-bromoheptane.
The halogen is a prefix to the alkane. The haloalkanes (halogenoalkanes) are a group of chemical compounds derived from alkanes containing one or more halogens (fluorine, chlorine, bromine...).

The answer is 323 g.