2Mg + 2H3PO4 → Mg3(PO4)2 + 3H24Al + 3O2 → 2Al2O3HNO3 is not involved in the given chemical reactions.
2Mg + 2H3PO4 → Mg3(PO4)2 + 3H2
4Al + 3O2 → 2Al2O3
HNO3 is not involved in the given chemical reactions.