Chemistry Forum

Hi, can anybody help me with this question?

The coordination number, oxidation number, and name of the complexes of:

[Zn(NH₃)₄]Cl₂ and [Cr(en)(C₂O₄)₂]-[/b]

[Zn(NH₃)₄]Cl₂ Zinc tetrammine chloride Zn is +2, CONo = 4

[Cr(en)(C₂O₄)₂]- Bisoxalato ethylendiamine chromat-III Cr is +3, CONo = 6

[/b] dont know