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28.... Enriching Uranium In naturally occurring uranium atoms, 99.3% = : 1.6605 × 10-27 kg) and 238 u, where u are 238U (atomic mass only 0.7% are 235 U (atomic mass 235 u). Uranium-fueled reac- tors require an enhanced proportion of 235U. Since both isotopes of uranium have identical chemical properties, they can be sepa- rated only by methods that depend on their differing masses. One such method is gaseous diffusion, in which uranium hexafluoride (UF) gas diffuses through a series of porous barriers. The lighter 235UF molecules have a slightly higher rms speed at a given tem- perature than the heavier 238UF molecules, and this allows the two isotopes to be separated. Find the ratio of the rms speeds of the two isotopes at 23.0 °C. 6 = =

28.... Enriching Uranium In naturally occurring uranium atoms, 99.3% = : 1.6605 × 10-27 kg) and 238 u, where u are 238U (atomic mass only 0.7% are 235 U (atomic mass 235 u). Uranium-fueled reac- tors require an enhanced proportion of 235U. Since both isotopes of uranium have identical chemical properties, they can be sepa- rated only by methods that depend on their differing masses. One such method is gaseous diffusion, in which uranium hexafluoride (UF) gas diffuses through a series of porous barriers. The lighter 235UF molecules have a slightly higher rms speed at a given tem- perature than the heavier 238UF molecules, and this allows the two isotopes to be separated. Find the ratio of the rms speeds of the two isotopes at 23.0 °C. 6 = =

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28.... are 238U (atomic mass ... Enriching Uranium In naturally occurring uranium atoms, 99.3% 238 u, where u = 1.6605 × 10-²7 kg) and only 0.7% are 235U (atomic mass 235 u). Uranium-fueled reac- tors require an enhanced proportion of 235U. Since both isotopes of uranium have identical chemical properties, they can be sepa- rated only by methods that depend on their differing masses. One such method is gaseous diffusion, in which uranium hexafluoride (UF) gas diffuses through a series of porous barriers. The lighter 235UF molecules have a slightly higher rms speed at a given tem- perature than the heavier 2³8UF molecules, and this allows the 6 = = 6 two isotopes to be separated. Find the ratio of the rms speeds of the two isotopes at 23.0 °C.
Transcribed Image Text:28.... are 238U (atomic mass ... Enriching Uranium In naturally occurring uranium atoms, 99.3% 238 u, where u = 1.6605 × 10-²7 kg) and only 0.7% are 235U (atomic mass 235 u). Uranium-fueled reac- tors require an enhanced proportion of 235U. Since both isotopes of uranium have identical chemical properties, they can be sepa- rated only by methods that depend on their differing masses. One such method is gaseous diffusion, in which uranium hexafluoride (UF) gas diffuses through a series of porous barriers. The lighter 235UF molecules have a slightly higher rms speed at a given tem- perature than the heavier 2³8UF molecules, and this allows the 6 = = 6 two isotopes to be separated. Find the ratio of the rms speeds of the two isotopes at 23.0 °C.
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