Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Some materials have negative heats of solution; the dissolution of one of these solutes in water is called?
Some materials have negative heats of solution; the dissolution of one of these solutes in water is called?

Molar masses can be used to determine the mass of a quantity of material.
What can be used to determine the mass of a quantity of material?

Most growing plant cells expand through water uptake.
How do most growing plant cells expand?