hoàn thành phương trình hóa học và caan bằng fe+ O2 --->.......... H2 + .....................--->H2O H2O+Na2O------>................ P+O2---->................. H2+............--->Cu+--->............ H2O+SO2--->......... ..............+...................--->Na2O Zn+HCL--->...........................+............... ....................+.......................-->H3PO4 ......................+......................--->SO2 Al+......................-->.............+H2 H2O+Ca---.............+................. KCLO3--->...............+............... Al+HCL--->................+................ KMNO4--->......+.......+......... Fe+H2SO4--->..........+........... ......+........--->FeCL2+H2 H2O+Na--->.............+....................