The number of moles of a solute dissolved in one litre of solution is defined as molarity. Molality is the number of moles of a solute dissolved in one kilogram of a solvent.

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Molarity is the number of moles of solute in one litre of solution, while molality is the number of moles of solute in one kilogram of solvent.

Molarity is expressed in moles per litre (mol/L), while molality is expressed in moles per kilogram (mol/kg).
Molarity is temperature dependent due to volume changes, while molality is temperature independent.
Molarity is commonly used in laboratory settings, while molality is used in calculations involving colligative properties.
Example: A solution with 0.5 moles of solute in 1 litre of water has a molarity of 0.5 mol/L, but the molality would depend on the mass of the water.

The number of moles of a solute dissolved in one litre of solution is defined as molarity. Molality is the number of moles of a solute dissolved in one kilogram of a solvent.

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