1. The problem statement, all variables and given/known data What is the amount of energy released when 1g of uranium 235 undergoes fission? Fission of uranium is: uranium + n -> Ba + Kr +12n. 2. Relevant equations E=Δmc^2 3. The attempt at a solution I found the mass of the reactants to be 236.05256u and the products to be 235.92392u. Thus Δm=-0.12864u There are 2.56207x10^21 nuclei in 1g. Therefore the energy needed is -165.122 J/g using E=Δmc^2. Is this the correct answer?