# Chapter 8 - Properties of Gases - Questions for Review and Thought - Applying Concepts - Page 370e: 106

a

#### Work Step by Step

We know that $C_2H_2$ will have the faster average speed, since it is less massive than $N_2$. This eliminates option b. Since $N_2$ has a larger pressure than $C_2H_2$, its peak should be higher. Thus, a is the correct option.

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