1. The problem statement, all variables and given/known data Calculate the amount of fission energy, in joules, that can be generated from 2kg of uranium fuel, if the U-235 represents 0.7% of the metal, and every fission reaction produces 200MeV. 2. Relevant equations 3. The attempt at a solution My attempt is irrelevant before i even know what does the energy per fission mean. I mean, in a fission of Uranium how many atoms are used???.. Anyway, i need some good replies on the qestion above!