Calculate the energy released, in kJ, when 10.3 moles of compound NB4 condenses from a gas to a liquid at 27°C.

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

Which characteristics can be used to differentiate star systems? check all that apply.

An object becomes electrically charged when: electrons are created in it electrons from it are destroyed electrons are transferred to it protons from it are destroyed protons are created in it