Question

How many sigma and pi bonds, respectively, are in the molecule below?

`CH_3CH_2CHCHCH_3`

Answer 1

14 sigma bonds
1 pi bond

Explanation:

The molecule is pent-2-ene:
[Image from alevelchem.com]

Every single line between atoms represents a sigma bond (there are 13 of these). The double line between carbons 2 and 3 represents a double covalent bond which is comprised of a sigma-bond and a pi-bond.