Part a name the complex ion [fe(cn)6]^3- . the oxidation number of iron is +3. part b name the complex ion [cu(nh3)2(h2o)4]^2+ . the oxidation number of copper is +2. part c name the complex crcl2(en)2 . the oxidation number of chromium is +2. part d name the salt [ni(h2o)3(co)]so4 . the oxidation number of nickel is +2. part e name the salt k4[pt(co3)2f2] given that the carbonate ion acts as a monodentate ligand in the complex. the oxidation number of platinum is +2.

Part A: Hexacyanoferrate (III)

Part B: (II)

Part C: Dichlorobis(ethylenediamine) Chromate (II)

Part D: Triaquocarbonylnickel (II) Sulphate

Part E: Potassium (II)

Explanation:

For naming the complex ions there is a specific rule

Nomenclature of the complex ions are as follow

                  * 1st negative,  2nd neutral, 3rd positive

                  * If there are more than 2 same charged ligand the write in                      

                    alphabetical order.

                                      NH3 named as ammine

                                      H2O names aqua or aquo

                                     CO named ascarbonyl

                                      NO named as nitrosyl

Keeping the rules in mind the complexes named as following.

Part A:

[Fe(CN)₆]³⁻

Name of the Complex : Hexacyanoferrate (III)  

Part B:

[Cu(NH₃)₂(H₂O)₄]²⁺

Name of the Complex : (II)

Part C

CrCl₂(en)₂

Name of the Complex :  Dichlorobis(ethylenediamine) Chromate (II)

Part C

[Ni(H₂O)₃(CO)]SO₄

Name of the Complex : Tetraaquocarbonylnickel (II) Sulphate

Part E

K₄[Pt(CO₃)₂F₂]

Name of the Complex : Potassium (II)

the temperature of the gas, in k, not celsius.