21. Solving a chemistry problem

1. Write the coordination formulas of the following compounds:
potassium tetrachloroaurate (III), barium hexahydroxochromate (III), nitritepentaamminechromium (III) chloride (III), barium thiocyanatotricyanocuprate (II), dichlorodiammineplatinum, ammonium disulfatoferrate (II), hydrogen hexacyanoferrate (III), hydrogen hexafluorosilicate (IV), hexaamminecobalt (II) hydroxide, potassium tetrathiocyanatohydrohydrate (II), cyanotetraamminequacobalt (III) bromide.