Answer: C0- 1 copper atom, 2 nitrogen, 6 oxygen atoms.
(NH4)3PO4- 12 atoms of hydrogen, three atoms of nitrogen, one atom of phosphorus, and four atoms of oxygen
NH42Cr- 1 molecule of ammonium dichromate,
AlNO3- a-1 n-3 o-9
NH4NO3- n- 2 h-4 o-3
Step-by-step explanation: