How many moles of each element are in 1 mole of ammonium nitrate?

This is the formula for ammonium nitrate NH4NO3

Of moles of NH4NO3 = 16/80 i. e. 0.2 moles of Ammonium Nitrate. 1 molecule of NH4NO3 contains 1 atom of N. Hence, 1 mole of NH4NO3 would contain 1 mole of Nitrogen atoms and therefore 0.2 moles of NH4NO3 should contain 0.2 moles of Nitrogen atoms.