HEELP ME!!! W podanych równaniach reakcji dobierz współczynniki stechiometryczne na podstawie bilansu elektronowego: 1. HCLO4+SO2+H2O--->HCL+H2SO4 2.HNO3+PBS--->PBSO4+NO2+H2O 3.NH3+O2--->NO+H2O 4.CU+H2SO4--->CUSO4+SO2+H2O

[latex]1. HClO_4+SO_2+H_2O-->HCl+H_2SO_4\ \ Cl^V^I^I+8e-->Cl^-^I\ S^I^V-2e-->S^V^I /cdot 4\ \ HClO_4+4SO_2+4H_2O-->HCl+4H_2SO_4 [/latex]     [latex]2. HNO_3+PbS-->PbSO_4+NO_2+H_2O\ \ N^V+e-->N^I^V /cdot 8\ S^-^I^I-8e-->S^V^I\ \ 8HNO_3+PbS-->PbSO_4+8NO_2+4H_2O [/latex]     [latex]3. NH_3+O_2-->NO+H_2O\ \ O_2^0+4e-->2O^-^I^I /cdot 5\ N^-^I^I^I-5e-->N^I^I /cdot 4\ \ 4NH_3+5O_2-->4NO+6H_2O [/latex]     [latex]4. Cu+H_2SO_4-->CuSO_4+SO_2+H_2O\ \ Cu^V^I+2e-->S^I^V\ Cu^0-2e-->Cu^I^I\ \ Cu+2H_2SO_4-->CuSO_4+SO_2+2H_2O [/latex]