Calculate relative lowering of vapour pressure of 0.161 molal aqueous solution

Explanation

To calculate the relative lowering of vapor pressure of a 0.161 molal aqueous solution, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Molality**:
- Molality (m) is defined as the number of moles of solute per kilogram of solvent.
- Given that we have a 0.161 molal solution, this means there are 0.161 moles of solute in 1 kg (1000 g) of solvent (water).

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