Hey,

N=M×n means molarity× number of moles.

So, if you don't know the number of moles then, another formula of finding normality is

N= [weight (gms)/equivalent weight] × [1000/ volume (lt)]

N = (M)(number of hydrogen or hydroxide ions)

For example, a 2 M H2SO4 solution will have a Normality of 4N (2 M x 2 hydrogen ions). A 2 M H3PO4, solution will have a Normality of 6N. How?

M=2 and n=3(3 moles of hydrogen)

So, 2×3=6

Hope this helps!

When a partially filled container of liquid is sealed with a stopper, some liquid molecules at the surface evaporate into the vapor phase . However, the vapor molecules cannot escape from the container and so after a certain amount of time, the space above the liquid reaches a point where it cannot hold any more vapor molecules. Now some of the vapor molecules condense back into a liquid. The system reaches the point where the rate of evaporation is equal to the rate of condensation. This is called a dynamic equilibrium between the liquid and vapor phases.

Hope this clears your doubt. Thank you.