Question

# Molality is expressed in:

Hint: Molality: It is defined as the ratio of no. of moles of solute to that of the mass of the solvent in kg. And we know that mass is independent of temperature and so molarity.

${ Molality= }\frac { no.\quad of\quad moles\quad of\quad solute }{ weight\quad of\quad solvent\quad in\quad kg }$
Hence, it can be expressed as moles per kilograms or ${ mol\quad kg }^{ -1 }$.