Plis I need help in this 6.7 m/s it’s wrong

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

Which type of wave can travel without a medium

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear