Which process, nuclear fusion or nuclear fission, creates more energy?

nuclear fusion produces more energy than fission ☻M.H&A.A yes Per unit mass, nuclear fusion creates energy 400 times more than nuclear fission.

the reaction mixture contains some ammonia, plus a lot of unreacted nitrogen and hydrogen. the mixture is cooled and compressed, causing the ammonia gas to condense into a liquid. the liquefied ammonia is separated and removed. the unreacted nitrogen and hydrogen are then recycled back into the reactor .