When a complex ion forms, arrange themselves around , creating a new ion with a charge equal to the sum of the charges of its components. Select the correct answer below: transition metal ions, the ligand ions, the coordinate complex ligands, the central atom none of the above

4.25g sample of solid ammonium nitrate dissolves in 60.0g of water in a coffee-cup calorimeter, the temperature drops from 22.0 c to 16.9 c. assume that the specific heat of the solution is the same as that of pure water. calculate delta(h) (in kj/mol nh4no3) for the solution proces.