Write the formula of the following (i) 4-Methylpent-3-en-2-one (ii) 2-Ethoxy-4-methoxypentan-3-one

Explanation

To write the formulas for the given compounds, we will follow a systematic approach to construct their structures based on the IUPAC naming conventions provided.

### Step-by-Step Solution:

#### (i) 4-Methylpent-3-en-2-one

1. **Identify the Parent Chain**: The name indicates that the parent chain is a pentane (5 carbon atoms). We will draw a straight chain of 5 carbon atoms.
- Structure: C-C-C-C-C
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