as the barium hydroxide soultion is added to the solution of sulfuric acid, the electrical conductivitiy of the acid solution decreases because the

Outermost (valence) electrons

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 !