In a fission event of ${}_{92}^{238}\mathrm{U}$ by fast moving neutrons, no neutrons are emitted and final products, after the beta decay of the primary fragments, are ${}_{58}^{140}\mathrm{Ce}$ and ${}_{44}^{99}\mathrm{Ru}$. Calculate $\mathit{Q}$ for this process. Neglect the masses of electrons/ positrons emitted during the intermediate steps. 3
Given:
$\mathit{m}\left({}_{92}^{238}\mathrm{U}\right)=238.05079\mathrm{u}$;
$\mathit{m}\left({}_{58}^{140}\mathrm{Ce}\right)=139.90543\mathrm{u}$
$\mathit{m}\left({}_{44}^{99}\mathrm{Ru}\right)=98.90594\mathrm{u};\mathit{m}\left({}_0^1\mathit{n}\right)=1.008665\mathrm{u}$