What is Molality? 

It is the ratio of moles of substance to kilogram of solvent.
Where mole is weight in gram divided by molecular weight.
Molality is chemistry terminology.

Molality (m) :- 

                                No. of moles of the solute  / Mass of solvent in Kilogram (Kg).

   

Unit =>   m = Moles/Kg

What is Molality

YouTube Video on Molality and Molarity