From the aqueous solutions of NaCl , HCl(g), `NH_(3),H_(2)O ,CO_(2),MgCl_(2),C_(6)H_(12)O_(6) ` select
The substances containing both molecules and ions.

Explanation

To solve the question of which substances from the given list contain both molecules and ions when dissolved in aqueous solutions, we will analyze each substance step by step.

### Step 1: Analyze NaCl
- **Dissociation**: NaCl is an ionic compound. When dissolved in water, it completely dissociates into Na⁺ and Cl⁻ ions.
- **Conclusion**: NaCl contains only ions, no molecules. **Not a correct answer.**

### Step 2: Analyze HCl
- **Dissociation**: HCl is a strong acid. When dissolved in water, it completely dissociates into H⁺ and Cl⁻ ions.
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