The sum of coordination number and oxidation number of the metal M in the complex `[M(en)_2(C_2O_4)]Cl` (where en is ethylenediamine) is:

The sum of coordination number and oxidation number of the metal M in the complex [M(en)_(2)(C_2O_4)]Cl (where en is ehtylenediamine) is ________.

The sum of coordination number and oxidation number of the metal M in the complex [M(en)_(2) (C_(2)O_(4))]Cl (where en is ethylenediamine) is:

The sum of coordination number and oxidation number of the metal M in the complex [M(en)_(2) (C_(2)O_(4))]CI (where en is ethylenediamine) is:

The sum of coordination number and oxidation number of the metal M in the complex [M(en)_(2)(C_(2)O_(4))]Cl is -

The coordination number and the oxidation state of the element 'E' in the complex [E(en)_2(C_2O_4)]NO_2 (where (en) is ethylenediamine) are, respectively

The coordination number and the oxidation state of the element 'E' in the complex [E(en)_2(C_2O_4)]NO_2 (where (en) is ethylenediamine) are, respectively