In gaseous form at the same temperature, the average speed of U-238 compared to the speed of U-235 is
A)less.
B)more.
C)the same.

Name: In gaseous form at the same temperature, the average speed of U-238 compared to the speed of U-235 is A)less. B)more. C)the same.
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Question

Quizplus · Accepted Answer

The average speed of a gas molecule is inversely proportional to the square root of its molar mass (as per the kinetic theory of gases). Since U-238 has a slightly higher molar mass than U-235, its average speed will be less.

In Gaseous Form at the Same Temperature, the Average Speed