How many metamers of 3-pentanone are possible ? Write their structures and IUPAC names. Can these be regarded as position isomers as well ?

Explanation

To determine how many metamers of 3-pentanone are possible, we first need to understand what metamers are. Metamers are structural isomers that differ in the arrangement of atoms around a functional group, in this case, the ketone group (C=O) in 3-pentanone.

### Step-by-Step Solution:

1. **Identify the Structure of 3-Pentanone**:
- 3-Pentanone has the following structure:
```
CH3-CO-CH2-CH2-CH3
...