1)
K2O+SO3=K2SO4
K2O+CO2=K2CO3
CaO+SO3=CaSO4
CaO+CO2=CaCO3
2)
FeO + 2HBr = FeBr2 + H2O
FeO + H2SO4 = FeSO4 + H2O
Li2O + 2HBr = 2LiBr + H2O
Li2O + H2SO4 = Li2SO4 + H2O
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Verified answer
1)
K2O+SO3=K2SO4
K2O+CO2=K2CO3
CaO+SO3=CaSO4
CaO+CO2=CaCO3
2)
FeO + 2HBr = FeBr2 + H2O
FeO + H2SO4 = FeSO4 + H2O
Li2O + 2HBr = 2LiBr + H2O
Li2O + H2SO4 = Li2SO4 + H2O