how many gram of uranium will radiate the equivelent energy output of a major earthquake measuring 10^19J?

Energy from fission of uranimu 223 is 10^-12.

3 answers

Is that 1E-12 J/atom or J/mol or J/gram or some other unit?
J/atom
1E-12 J/atom x (#atoms) = 1E19 J total.
Solve for # atoms.
(#atoms/6.02E23) = # moles U atoms
Convert moles to grams by g = moles x molar mass. This number appears to me to be too large so check my reasoning carefully.