Calculate the molality of a solution containing 5.3 g of anhydrous `Na_(2)CO_(3)` in 400 g of water.

Explanation

To calculate the molality of a solution containing 5.3 g of anhydrous Na₂CO₃ in 400 g of water, we can follow these steps:

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

### Step 2: Calculate the moles of Na₂CO₃
To find the moles of Na₂CO₃, we need to use the formula:
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