What must occur for a change to be a chemical reaction

1.The reactants must collide
2.The reactants must collide with sufficient energy to react
3.The reactants must collide in the correct orientation

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !