Ответ:

1) CO2, SO3, CO, K2O, N2O5, Li2O,

2) K2O + H2O = 2 KOH

SO2 + 2 H2O = H2SO3

MgO + H2O = Mg (OH)2

3) N2O5 + H2O = 2 HNO3

SiO + H2O = H2SiO2

FeO + H2O = Fe (OH)2

Li2O + H2O = 2 LiOH