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A one-molal (1 m) solution is defined as a solution that contains one mole of solute dissolved in:

1. 1000 g of the solvent
2. one litre of the solution
3. one litre of the solvent
4. 22.4 litres of the solution

Correct answer: 1000 g of the solvent

Solution

Molality (m) equals moles of solute per kilogram (1000 g) of solvent, independent of temperature.

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