1)4N(-3)H3(+1)+5O2=4N(+2)O(-2)+6H2(+1)O(-2)
N(-3)-5е=N(+2)
O2(0)+4е=2O(-2)
2)4N(-3)H3(+1)+3O2(0)=2N2(0)+6H2(+1)O(-2)
N(-3)-3е=N(0)
O(0)-2е=O(-2)
1)4N(-3)H3(+1)+5O2=4N(+2)O(-2)+6H2(+1)O(-2)
N(-3)-5е=N(+2)
O2(0)+4е=2O(-2)
2)4N(-3)H3(+1)+3O2(0)=2N2(0)+6H2(+1)O(-2)
N(-3)-3е=N(0)
O(0)-2е=O(-2)