There are two important isotopes of uranium— 235U
have different atomic masses. Only 235U
is very useful in nuclear reactors. One of the techniques for separating them (gas diffusion) is based on the different average velocities vrms
of uranium hexafluoride gas, UF6
. (a) The molecular masses for 235U UF6
and 238U UF6
are 349.0 g/mol and 352.0 g/mol, respectively. What is the ratio of their average velocities? (b) At what temperature would their average velocities differ by 1.00 m/s? (c) Do your answers in this problem imply that this technique may be difficult?