`10gm` of a solute is dissolved in `80gm` of acetone .V.P. of this sol`=271 mm "of" Hg`. If V.P. of acetone is `283 mm "of" Hg`. Calculate molar mass of solute.

Explanation

To calculate the molar mass of the solute, we will use Raoult's Law, which relates the vapor pressure of a solution to the vapor pressure of the pure solvent and the mole fraction of the solute.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- Mass of solute (W_s) = 10 g
- Mass of solvent (W_a) = 80 g (acetone)
- Vapor pressure of the solution (P_s) = 271 mm Hg
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