How many total moles of ions are released

How many total moles of ions are released when each of the following samples dissolves completely in water?

a) 0.32 mol of NH4C1,
b) 25.4 g of Ba(OH)2⋅8H2OBa(OH)2⋅8H2O,
c) 3.55×10193.55×1019 formula units of LiCl