Chemistry hw help???????

Question

A molecule has 40 carbons. All of these have sp2 or sp3 hybridization. If you have 6 double bonds and 5 rings, how many hydrogens will you have?

thanx
so 60 is the final answer?

Answer 1

OK..If the molecule was a linear alkane, it would have the empirical formula CnH(2n+2) and so would have 82 hydrogens.

Every time you form a double bond, you remove 2 hydrogens from the alkane. Also, every time you form a cyclo-alkane, you also remove 2 hydrogens.

So, given all that, I think you should be able to figure out how many hydrogens you'd have left.