The vapour pressure of a `5%` aqueous solution of a non-volatile organic substance at `373 K`. Is `745 mm`. Calculate the molecular mass of the solute.

Explanation

To solve the problem of calculating the molecular mass of the solute from the given data, we can follow these steps:

### Step 1: Understand the Given Data
- The vapor pressure of the solution (P_s) = 745 mm Hg
- The vapor pressure of the pure solvent (P_0) = 760 mm Hg (for water at 373 K)
- The weight percentage of the solute = 5%
- The weight of the solvent = 100 g - 5 g = 95 g

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