O2________ H2________ Mn________ Ba________
F2________ He________ Pb________ Fe________
Cl2________ Ne________ I2________ Ar________
H2O________ CaO________ CuO________ CO________
CO2________ SO2________ NO________ Na2O________
N2O5________ Fe2O3________ FeO________ Fe3O4________
MgO________ Al2O3________ HgO________ Na2O________
NaCl________ KCl________ CaCl2________ MgCl2________
AlCl3________ ZnCl2________ FeCl2________ FeCl3________
CuCl2________ AgCl________ BaCl2________ Fe2S3________
Na2S________ FeS________ HCl________ H2SO4________
NaOH________ NaNO3________ Na2SO4________ Na2CO3________
KOH________ KNO3________ K2SO4________ K2CO3________
Ca(OH)2________ Ca(NO3)2________ CaSO4________ CaCO3________
Al(OH)3________ Al(NO3)3________ Al2(SO4)3________ H2CO3________
Ba(OH)2________ Ba(NO3)2________ BaSO4________ BaCO3________
Cu(OH)2________ Cu(NO3)2________ CuSO4________ NH4Cl________
NH4NO3________ HNO3________.