Which alkyl halide has the highest density and why?

Explanation

To determine which alkyl halide has the highest density among the given options (CH3F, CH3Cl, CH3Br, CH3I), we need to analyze the molecular weights and the sizes of the halogen atoms attached to the alkyl group (in this case, the methyl group, CH3).

### Step-by-Step Solution:

1. **Understanding Density**:
- Density is defined as mass per unit volume (Density = Mass/Volume). To find which alkyl halide has the highest density, we need to consider both the mass of the molecule and its volume.

2. **Identifying the Alkyl Halides**:
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