Number of ions produced when `[Cu(NH_3)_4]Cl_2` is dissolved in water is/are

The number of ions formed when [Cu(NH_3)_4]SO_4 is dissolved in water is

The number of ions formed when [Cu(NH_(3))_(4)]SO_(4) is dissolved in water is

The shape of [Cu(NH_3)_4]Cl_2 is:

In aqueous solution magnesium chloride dissociates into ions as follows . MgCl_(2) (aq) to Mg^(2+) (aq) + 2 Cl^(-) (aq) Calculate the number of ions produced when 23.75g of magnesium chloride is dissolved in water .

How many ions are given by [Co(NH_3)_5Br]Cl_2 complex in water?