Question

Draw the structural formula of an alkane that has seven carbon atoms with two isopropyl groups

Answer 1

You want the alkane with seven carbons and then have two isopropyl groups? or the alkane with the seven carbons counting the carbons of the isopropyl group?.

Either way, I'll draw both structure, and use the one that it works for you:

The first structure, is the alkane with 7 carbons and two isopropyls groups aside (structure name, 3,4 - diisopropylheptane) and the second below that, would be the one with seven carbons including the isopropyl group counting. I think that's the one you need.

Anything else you need to be explained better or something to be fixed, tell me in a comment.

Hope this helps