4K+O2=2K2O
3Ca+2P=Ca3P2
2H2O=2H2+O2
2Al+3FeO=Al2O3+3Fe
CuO+H2=Cu+H2O
3H2SO4+2Al=Al2(SO4)3+3H2
AgNO3+KCl=AgCl+KNO3
FeCl3+3NaF=FeF3+3NaCl
N2O3+2NaOH=2NaNO2+H2O
4HCl+O2=2H2O+2Cl2
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Verified answer
4K+O2=2K2O
3Ca+2P=Ca3P2
2H2O=2H2+O2
2Al+3FeO=Al2O3+3Fe
CuO+H2=Cu+H2O
3H2SO4+2Al=Al2(SO4)3+3H2
AgNO3+KCl=AgCl+KNO3
FeCl3+3NaF=FeF3+3NaCl
N2O3+2NaOH=2NaNO2+H2O
4HCl+O2=2H2O+2Cl2