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Uranium-235 can be separated from U -238 by fluorinating the uranium to form UF 6 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 238 UF 6 and 235 UF 6. The atomic mass of U-235 is 235.054 amu and that of U-238 is 238.051 amu.

  • Chemistry -

    r1 = rate for U235
    r2 = rate for U238
    M1 = mass U235 = 235
    M2 = mass U238 = 238
    (r1/r2) = sqrt(M2/M1)

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