Which of the gases in the graph below has the smallest molar mass?
A)A
B)B
C)C
D)D
E)There is not enough information to determine the answer.

Question

Which of the gases in the graph below has the smallest molar mass? 
A)A 
B)B 
C)C 
D)D 
E)There is not enough information to determine the answer.

Quizplus · Accepted Answer

The gas with the smallest molar mass will have the highest average speed at a given temperature, according to the Kinetic Molecular Theory. This is because lighter gases have less mass to move around and thus can move faster than heavier gases. From the graph, gas A has the highest average speed at a given temperature, indicating that it has the smallest molar mass.

Which of the Gases in the Graph Below Has the Smallest