Question

define molarity??molality??normality??strength of a solution

Answer 1

Here's your answer
Molarity in chemistry is defined as no. of moles of solute divided by the number of liters of solution.
Molality is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent
Normality is a measure of concentration equal to the gram equivalent weight per liter of solution

Answer 2

same as above answer