Na2O+H2o=KaO+SO3=MgO+HNO3=SO2+NaOH=ZnO3+Na2CO3=

Question

Na2O+H2o=

KaO+SO3=

MgO+HNO3=

SO2+NaOH=

ZnO3+Na2CO3=

Comments

что в первом K или Ca

Answer 1

MgO + 2HNO3 = Mg(NO3)2 + H2O 
MgO + 2H + 2NO3 = Mg + 2NO3 + H2O
MgO + 2H = Mg + H2O

SO2 + 2NaOH = Na2SO3 + H2O
SO2 + 2Na + 2OH = 2Na + SO3 + H2O
SO2 + 2OH = SO3 + H2O