Hey everyone, I have a question which I think is probably easy but I have no idea how to do it.

I am familiar with the mole concept and I know it applies to this quesiton but I don't know how to answer it. I am also confused whetehr or not to take 1 mole of Nitrogen as 14.01g or 28.02g seeing as though Nitrogren exists as a diatomic molecule.

**Calculate the mass of nitrogren in 28.02g of ammonium nitrate.**

This is what I have done so far (but I don't know if it is even necessary :S

NH_{4}NO_{3}

Molar Mass = 14.01*2 + 1.008*4 + 16*3

= 80.052g

Then number of moles = mass/molar mass

= 28.02/80.052

= 0.35 mol

But now I'm not sure what to do next....

Thanks to all in advance.