In this picture below one object is attractive to another by-

Either air pressure or gravity. I would say its gravity because of the force of two object attracting each other.

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 !