Problem: The following graph shows the distribution of molecular velocities for two different molecules (A and B) at the same temperature. Which molecule would have the higher rate of effusion? a) A b) B c) not enough information to determine

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rate of effusion → proportional to molecular velocity

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The following graph shows the distribution of molecular velocities for two different molecules (A and B) at the same temperature. Which molecule would have the higher rate of effusion? 

A line graph with the molecular velocity measured in meters per second on the x axis, and the relative number of molecules on the y axis. Line A increases sharply and peaks at about five hundred, then approaches zero by fifteen hundred. Line B increases at a slower rate, reaching a peak about as half as high as that of A at approximately twelve fifty meters per second. Line B approaches zero at about twenty-five hundred.


a) A 

b) B 

c) not enough information to determine

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