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1. Mg(OH)2+2HNO3--->Mg(NO3)2+2H2O
2. MgO+N2O5--->Mg(NO3)2
3. Mg+2HNO3--->Mg(NO3)2+H2
4. Mg(OH)2+N2O5--->Mg(NO3)2+H2O
b)chlorek potasu- KCl
1. 2K+Cl2--->2KCl
2. KOH+HCl--->KCl+H2O
3. K2O+2HCl--->2KCl+H2O
4. 2K+2HCl--->2KCl+H2
c)siarczan(VI)sodu- Na2SO4
1. 2NaOH+H2SO4--->Na2SO4+2H2O
2. 2Na+H2SO4--->Na2SO4+H2
3. Na2O+SO3--->Na2SO4
4. Na2O+H2SO4--->Na2SO4+H2O
d)siarczek wapnia- CaS
1. Ca+S--->CaS
2. Ca(OH)2+H2S--->CaS+2H2O
3. CaO+H2S--->CaS+H2O
4. Ca+H2S--->CaS+H2