What is the difference between an orbit and an electron orbital

Orbital is a region of space around the nucleus where the probability of finding an electron is maximum and represents three dimensional motion of electron around nucleus. Also orbitals have different shapes where as orbit is circular in shape. an orbit is a trajectory with well defined position and momentum at all points and time.  Classical orbit is pretty easy to visualize, the Earth orbits the sun. An orbital is quantum mechanical.  Electrons posses wave properties and an orbital is the standing wave of a bound electron. 

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 !