Question

How to convert between normality (N) to molarity (mol/L)? I have 0.02N Na2S2O3

Answer 1

1 mol sodium thiosulfate dissociates to give 2 moles of sodium ions and 1 mole of thiosulfate ion.
So if your solution is .02 N that refers to the 2 moles of sodium ion that came from the dissociation of 1 mole of sodium thiosulfate.
That means that .01 M of sodium thiosulfate is the same as .02 N Na2S2O3