Which of the following statements is true about the average speed of an oxygen molecule,O₂,and that of a N₂ molecule in a gas at fixed temperature and pressure? M_O =16,M_N =14

Question

Quizplus · Accepted Answer

The average speed of gas molecules at a given temperature is inversely proportional to the square root of their molar mass. Since the molar mass of $O_2$ (32 g/mol) is greater than that of $N_2$ (28 g/mol), the average speed of $N_2$ molecules will be higher. The correct ratio of their speeds is given by the square root of the inverse ratio of their masses, which is $\sqrt{\frac{28}{32}}$ or $\frac{28}{32}^{1/2}$.

Which of the Following Statements Is True About the Average