molality

n. number of moles of solute per kilogram of solvent (Chemistry)

Noun
1. molal concentration
(hypernym) concentration

(m) Compare with molarity .Concentration measured as moles of solute per kilogram of solvent. For example, a 1 m NaCl solution contains 1 mole of NaCl per kilogram of water. Molalities are preferred over molarities in experiments that involve temperature changes of solutions, e. g. calorimetry and freezing point depression experiments.

Eng: molality
Urdu: کمیَّت ۔ مولیَّت