Осуществить цепочку превращений:
1) H2 -> H2S -> SO2 -> SO3 -> H2SO4
2) CuO -> H2O -> H2 -> HCL -> AgCl
3) N2 -> NH3 -> N2 -> NO -> NO2

H2+S=H2S2H2S+3O2=2SO2+2H2O2SO2+O2=2SO3SO3+H2O=H2SO4CuO+H2=Cu+H2O2H2O=2H2+O2H2+Cl2=2HClHCL+AgNO3=AgCl+HNO3N2+3H2=2NH34NH3+3O2=2N2+6H2ON2+O2=2NO2NO+O2=2NO2