Molality and Molarity

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why molarity changes with temperature while molality does not? thanks a lot

molarity = mol/L
molality = mol/kg

Volume changes with temperature (thermal expansion), mass does not (mass is invariant).

honestly, a lot of these questions you post can be researched easily with a quick Google search that will probably be of better help to you since it will be more immediate and you are more likely to remember it when you figure it out yourself.
 
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