What would be the molality of 20% (w/w) aqueous solution of x is (Molar mass.- 50) :

Explanation

To find the molality of a 20% (w/w) aqueous solution of a solute with a molar mass of 50 g/mol, follow these steps:

### Step 1: Understand the Definition of Molality
Molality (m) is defined as the number of moles of solute per kilogram of solvent. The formula is:
\[ m = \frac{\text{Number of moles of solute}}{\text{Mass of solvent (kg)}} \]

### Step 2: Determine the Mass of Solute and Solvent
In a 20% (w/w) solution, this means there are 20 grams of solute in 100 grams of solution. Therefore:
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