Common
Molality
Amount of substance of solute divided by the mass of the solvent
Molality
In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution. A commonly used unit for molality is moles of solute per kilogram solvent (mol/kg). A solution of concentration 1 mol/kg is often written as 1 molal (or 1 m).
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