Mole fraction of urea in its aqueous solution is 0.2, them molality of the solution will be.

Explanation

To find the molality of an aqueous solution of urea where the mole fraction of urea is given as 0.2, we can follow these steps:

### Step 1: Understand the mole fraction
The mole fraction (x) of a solute is defined as the number of moles of the solute divided by the total number of moles of all components in the solution. In this case, we have:
- Mole fraction of urea (solute) = 0.2
- Mole fraction of water (solvent) = 1 - 0.2 = 0.8

### Step 2: Calculate the number of moles of solute and solvent
...