noun, plural molalities. Chemistry.
the number of moles of solute per kilogram of solvent.

1920–25; molal + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
molality (mɒˈlælɪtɪ)
n , pl -ties
(not in technical usage) a measure of concentration equal to the number of moles of solute in a thousand grams of solvent

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

molality mo·lal·i·ty (mō-lāl'ĭ-tē)
The molal concentration of a solute, usually expressed as the number of moles of solute per 1,000 grams of solvent.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Molality is the number of of solute divided by the number of of solvent.
In that case, the moles of solutes are scaled to produce the molality as converted from the input data.
The shift is linear in the molality, but not molarity.
If you look at the results, the solution compositions of the mixture are the same in terms of molality.
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