a, 4Al+3O_2\overset{t^o}{\rightarrow} 2Al_2O_3
b, 2H_2+O_2\overset{t^o}{\rightarrow} 2H_2O
c, Al+3AgNO_3\rightarrow Al(NO_3)_3+3Ag
d, 2Zn+O_2\overset{t^o}{\rightarrow} 2ZnO
e, Fe+2HCl\rightarrow FeCl_2+H_2\uparrow
f, CaO+2HNO_3\rightarrow Ca(NO_3)_2+H_2O
g, Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow...