Write the `IUPAC ` name for the following compounds
(a) `[Co(NH_(3))_(5)ONO]Cl_(2)`
(b) `K_(3)[Cr(CN)_(6)]` .

Explanation

To write the IUPAC names for the given coordination compounds, we will follow the systematic approach outlined in the video transcript. Here’s the step-by-step solution for each compound:

### (a) For the compound `[Co(NH3)5ONO]Cl2`

1. **Identify the Ligands**:
- The ligands present are five ammonia (NH3) molecules and one nitrito ligand (ONO). The nitrito ligand is specifically bonded through the oxygen atom, hence it is referred to as nitrito-O.

2. **Determine the Order of Ligands**:
...