The development of the atomic bomb was to show that 235U and 238U is the fissionable isotope. a mass spectrometer was employed to separate 235 UF6 from 238UF6. Compute the value S for the separation of 100mg of the mixture of gas given that the natural abundances of 235U and 238U are 0.72% and 99.28% respectively and that of 19F is 100%