Question

the molality of pure of the solution containing 2.8 % mass volume solution of potassium Hydroxide is

Answer 1

2.8% by mass means 2.8 g in 1l soln.

molarity=moles/volume(liter).

molar mass of KOH=39+16+1=56

moles=2.8/56=0.05

molarity=0.05/1=0.05