Calculate the molality of a 9.8% (w/w) solution of `H_2SO_4`.

Explanation

To calculate the molality of a 9.8% (w/w) solution of sulfuric acid (H₂SO₄), we will 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 for molality is:
\[ m = \frac{\text{moles of solute}}{\text{mass of solvent (kg)}} \]

### Step 2: Determine the Mass of Solute and Solvent
Given that we have a 9.8% (w/w) solution, this means there are 9.8 grams of solute (H₂SO₄) in 100 grams of the solution.
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