Sodium Nitrate NaNO3 (subscript) for sodium ion Na+ and and nitrate ion NO3- combine to form this compound
PtO2
Formula: NaI
The chemical symbol for copper is Cu from the Latin Cuprum.
Hydrogen oxide (you'll occasionally see "dihydrogen monoxide" but that's overkill).
The chemical formula of calcium oxide is CaO.
The chemical formula for copper oxide is CuO.
Na2SO4
SO4
The chemical formula (not equation) of sodium hydrogen sulfite is NaHSO3.
Well for sodium chloride, it would be NaCl
Sodium Nitrate NaNO3 (subscript) for sodium ion Na+ and and nitrate ion NO3- combine to form this compound
ZnO
The formula for lithium oxide is Li2O.
LiOH2 P2O5H2O
Formula: NaClO3
PtO2