A student is asked to identify an element that is pale yellow brittle solid and does not conduct electricity

Variables,control,conclusion and finally scientific theory

Yes it would be a physical change.

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 !

Answer/when the cell uses energy;