Effusion of a 1:1 Mixture of Two Gases,represented by Unshaded

question 107

Multiple Choice

Effusion of a 1:1 mixture of two gases,represented by unshaded and shaded spheres in the diagram below,through a small pinhole produces the result shown below.The shaded spheres have a molecular mass of 32 amu.Which gas molecules have the higher average speed and what is the molecular mass of the unshaded molecules?

• A)Unshaded molecules have higher average speed and molecular mass = 14 amu.
• B)Unshaded molecules have higher average speed and molecular mass = 21 amu.
• C)Unshaded molecules have lower average speed and molecular mass = 48 amu.
• D)Unshaded molecules have lower average speed and molecular mass = 72 amu.

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