elliyca77 elliyca77 21-12-2022 Chemistry contestada 6. [1 mark] Which complex ion contains a central ion with an oxidation state of +3? C. [Ni(NH3),(H2O)]* D. [Co(NH3)4Cl₂]* A. [PtCl6]² B. [Cu(H₂O)4(OH)₂]