Cân bằng các phương trình sau theo phương pháp thăng bằng electron:
\(1.FeO+HNO_3\rightarrow Fe\left(NO_3\right)_3+N_xO_y+H_2O\\ 2.M+HNO_3\rightarrow M\left(NO_3\right)_n+N_xO_y+H_2O\\ 3.Fe_2O_3+Al\rightarrow Fe_xO_y+Al_2O_3\\ 4.Fe_mO_n+HNO_3\rightarrow Fe\left(NO_3\right)_3+NO+H_2O\\ 5.FeS_2+HNO_3\rightarrow Fe\left(NO_3\right)_3+N_2O_x+H_2O+H_2SO_4\)
1)
(5x-2y)FeO+(16x-6y)HNO3\(\rightarrow\)(5x-2y)Fe(NO3)3+NxOy+(8x-3y)H2O
2)
(5x-2y)M+(6nx-2ny)HNO3\(\rightarrow\)(5x-2y)M(NO3)n+nNxOy+(3nx-ny)H2O
3)
3xFe2O3+(6x-4y)Al\(\rightarrow\)6FexOy+(3x-2y)Al2O3
4)
3FemOn+(12m-2n)HNO3\(\rightarrow\)3mFe(NO3)3+(3m-2n)NO+(6m-n)H2O
5)
(10-2x)FeS2+(60-6x)HNO3\(\rightarrow\)(10-2x)Fe(NO3)3+15N2Ox+(10+x)H2O+(20-4x)H2SO4
