Urea forms an ideal solution in water. Determine the vapour pressure of an aqueous solution containing `10%` by mass of urea at `40^(@)C` (Vapour pressure of water at `40^(@)C="55.3 mm Hg`)

Explanation

To determine the vapor pressure of an aqueous solution containing 10% by mass of urea at 40°C, we can follow these steps:

### Step 1: Calculate the mass of urea and water in the solution
Assume we have 100 g of the solution. Since the solution is 10% urea by mass:
- Mass of urea = 10% of 100 g = 10 g
- Mass of water = 100 g - 10 g = 90 g

### Step 2: Calculate the number of moles of urea and water
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