# Why are #"molality"#, and #"mass percent"# SOMETIMES used in preference to #"molarity"#?

##### 1 Answer

May 22, 2017

#### Answer:

Because both

#### Explanation:

And by the same token, consider the alternative,

Now the numerator is invariant with temperature, but the denominator DOES vary with temperature. Of course, at so-called infinite dilution,