Question

Question #d7c12

Answer 1

First, you draw the formula. Then you count the bonds.

Explanation:

The formula of pent-3-en-1-yne is

Every C-C and C-H bond has one σ bond.

There are 6 C-H bonds and 4 C-C bonds.

So there are 10 σ bonds.

All the extra bonds are π bonds.

So the C=C double bond has 1 π bond, and the C≡C triple bond has 2 π bonds.

This makes a total of 3 π bonds.

The molecule has 10 σ bonds and 3 π bonds.