In the mechanism for electrophilic aromatic substitution with a diazonium ion as the electrophile, why does nucleophilic attack occur on the terminal nitrogen of the diazonium ion rather than on the nitrogen that has the formal positive charge?

David has two containers of two different gases at the same temperature and pressure. david could assume all of following except a. when the temperature is increased, the volume of both containers will increase b. when the pressure is increased, the volume of both containers will decrease c. both containers contain the same number of gas particles d. when the pressure is decreased, the temperature of both containers will increase