1) 3Mg+2H3PO4=Mg3(PO4)2+3H2
2) 2Na+2HCl=2NaCl+H2
3) BaO+H2SO3=BaSO3+H2O
4) SO2+2NaOH=Na2SO3+H2O
5) K2O+SO3=K2SO4
6) HBr+NaOH=NaBr+H2I
7) 2Fe+3H2SO4=Fe2(SO4)3+3H2
8) Al2O3+6HCl=2AlCl3+3H2O
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Answers & Comments
1) 3Mg+2H3PO4=Mg3(PO4)2+3H2
2) 2Na+2HCl=2NaCl+H2
3) BaO+H2SO3=BaSO3+H2O
4) SO2+2NaOH=Na2SO3+H2O
5) K2O+SO3=K2SO4
6) HBr+NaOH=NaBr+H2I
7) 2Fe+3H2SO4=Fe2(SO4)3+3H2
8) Al2O3+6HCl=2AlCl3+3H2O