Posted by Charlie on .
Uranium235 can be separated from U238 by fluorinating the uranium to form UF6 (which is a gas) and then taking advantage of the different rates of effusion and diffusion for compounds containing the two isotopes.
Calculate the ratio of effusion rates for 238UF6 and 235UF6 The atomic mass of U235 is 235.054amu and that of U238 is 238.051amu.
What steps do I take to answer this question?

Chemistry 
bobpursley,
rates of effusion are inversely proportional to the sqrt of atomic masses.
Rate235/rate238= sqrt (238.05/235.054)