How many ions are produced from $[Co(NH_3)_6]Cl_3$ in solution?

The coordination number of aluminum in its common complexes is

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron$(II)$,the number of $Fe-C$ bond$(s)$ is

The molecular formula of potash alum is

The set containing only ambidentate ligands in the following is:

$A$ coordination compound $CrCl_{3} \cdot 4 H_{2} O$ precipitates silver chloride when treated with silver nitrate. The molar conductance of its solution corresponds to a total of two ions. Write the structural formula of the compound and name it.