Can someone explain electron configuration to me cuz im completly lost

Like all it is a I spy game. but with patterns. look for your element and remember your quads. then just think left minus right add.

Because a model would make the investigation easier to understand

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 !