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а) Na2O->NaOH->Na2SO4
б)FeO->FeCl2>-<-Fe(OH)2
в) SO3->Na2SO4->BaSO4
а) Na2O->NaOH->Na2SO4
б)FeO->FeCl2>-<-Fe(OH)2
в) SO3->Na2SO4->BaSO4
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Answers & Comments
2NaOH+H2SO4=Na2SO4+2H2O
б) FeO+2HCl=FeCl2+H2O
FeCl2+2NaOH=Fe(OH)2+2NaCl
в)SO3+Na2O=Na2SO4
Na2SO4+BaCl=BaSO4+NaCl