Question

If the number of molecules present in V litre of N2 at STP is N, what will be the number of molecules in 2V litre?

Answer 1

use PV=nRT

n is no. of moles which we can write as n = N/ avogadro constant

so V is directly related to N

Now molecules in 2V litre = 2N

Answer 2

Where NA=6.023×10²³