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Transcribed Image Text:rial. The rate of diffusion depends on the rms speed. What
is the ratio of the rms speeds for the molecules of the two
compounds? The atomic mass of fluorine is 19 u.
Transcribed Image Text:6 (II) Naturally occurring uranium is a mixture of two iso-
topes 235U and 238U. (They have the same position in the
periodic table but have different masses.) To produce "en-
riched uranium," with a greater fraction of 235U that is
required by nuclear reactors, the compound UF, is first
formed and the gas allowed to diffuse through porous mate-
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