A `100cm^(3)` solution of sodium carbonate is prepared by dissolving 8.653 g of the salt in water. The density of solution is 1.0816 g per millilitre. What are the molarity and molality of the solution ? (Atomic mass of Na is 23, of C is 12 and of O is 16).

Explanation

To solve the problem of finding the molarity and molality of a sodium carbonate solution, we can follow these steps:

### Step 1: Calculate the Molar Mass of Sodium Carbonate (Na₂CO₃)
The molar mass of sodium carbonate can be calculated using the atomic masses provided:
- Sodium (Na): 23 g/mol
- Carbon (C): 12 g/mol
- Oxygen (O): 16 g/mol

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