"Identify the solid remaining when each of the following is heated (a) Lithium trioxonitrate (v). (b) Potassium trioxonitrate (v). (C) Calcium trioxonitrate (v)."

Answer 1

Nitrate is the correct IUPAC name for NO3^.
The solid left on heating those three nitrates are
Li2O, K2O and CaO