chemistry MOLAR equations. help!?

Question

in my coursework sheet it asks me :

how many moles of oxygen and how many moles of nitrogen are in 1.50 moles of ammonium phosphate?

can someone help me with this?

i have always had trouble on questions which ask the moles of a part of the compound. it really doesnt make sense.

Answer 1

(NH4)2HPO4 Each DAP mole has 4 moles O and 2 moles N

1.50molDAP x 4molO/1molDAP = 6 moles O

1.5molDAP x 2molN/1molDAP = 3 moles N

They're asking for moles of atoms.