Molality or molal concentration (b; formerly m) is a concentration in which the amount of solute is stated in moles and the amount of solvent in kilograms.
bA =
nA/msolvent
The unit of molality is mol kg-1.
Citing this page:
Generalic, Eni. "Molality." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.