a)4Cu+O2-->2Cu2O
b) 4Al+3O2-->2Al2O3
d) 2K+Cl2-->2KCl
e) 2CuO+C-->2Cu+CO2
f) H2+Cl2-->2HCl
g) 2N2O-->2N2+O2
h) CH4+2O2-->CO2+2H2O
i) 2Pb+O2-->2PbO
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a)4Cu+O2-->2Cu2O
b) 4Al+3O2-->2Al2O3
d) 2K+Cl2-->2KCl
e) 2CuO+C-->2Cu+CO2
f) H2+Cl2-->2HCl
g) 2N2O-->2N2+O2
h) CH4+2O2-->CO2+2H2O
i) 2Pb+O2-->2PbO