How many `sp^(2)-sp^(2) C-C sigma` bonds are present in acetophenone.

Explanation

To determine how many `sp²-sp²` C-C sigma bonds are present in acetophenone, we can follow these steps:

### Step 1: Understand the Structure of Acetophenone
Acetophenone has the following structure:
- It consists of a phenyl group (a benzene ring) attached to a carbonyl group (C=O).
- The carbonyl carbon is `sp²` hybridized.
- The carbons in the benzene ring are also `sp²` hybridized.

### Step 2: Identify the `sp²` Carbons
In acetophenone:
- The carbon in the carbonyl group (C=O) is `sp²`.
- The carbons in the benzene ring are all `sp²`.
- The methyl group (CH₃) attached to the carbonyl carbon has one carbon that is `sp³`.

### Step 3: Count the `sp²`-`sp²` C-C Sigma Bonds
Now, we need to count the sigma bonds between the `sp²` carbons:
1. The carbonyl carbon (C=O) is connected to the benzene ring, forming one `sp²-sp²` bond.
2. Each carbon in the benzene ring is connected to adjacent carbons in the ring, forming additional `sp²-sp²` bonds.

Counting these:
- In the benzene ring, there are 6 carbons, and each carbon is connected to two other carbons in the ring.
- This results in 6 `sp²-sp²` bonds within the ring.
- Including the bond between the carbonyl carbon and the benzene ring, we have a total of 7 `sp²-sp²` C-C sigma bonds.

### Final Count
Thus, the total number of `sp²-sp²` C-C sigma bonds in acetophenone is **7**.