Posted by Anonymous on Sunday, January 9, 2011 at 9:12am.
Enriched uranium is produced via gaseous diffusion of UF6. Suppose a process were developed to allow diffusion of gaseous uranium atoms, U (g). Calculate the ratio of diffusion rates of U235 and U238, and compare it to the ratio for UF6 given in the essay.

Chemistry  drwls, Sunday, January 9, 2011 at 9:23am
What essay are you talking about?
The diffusion constant D, which is proportional to the diffusion rate, is proportional to sqrt(1/M), where M is the molecular or atomic weight.
You are probably supposed to compare sqrt(238/235) with sqrt(352/349).
The former applies to the atomic vapor and the latter applies to the hexafluoride.
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