Question

the number of mole of n atom in 18.066x10^23 nitrogen atoms is

Answer 1

Avogadros number: 6.02214*10^23 number of elements (atoms etc) in 1 mole.

So (18.066*10^23) / (6.02214*10^23)  = 2,99993 moles = almost 3 (if you round it up)