PLEASE HELP, I'M DOING A TEST I NEED HELP PLEASE!!

What is the internal energy of 4.00 mol of diatomic nitrogen gas n2 at 455k

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell