Problem: Consider the following drawing.If curves A and B refer to two different gases, He and O2 at the same temperature, which curve corresponds to He?

🤓 Based on our data, we think this question is relevant for Professor Lapeyrouse's class at UCF.

FREE Expert Solution

We are asked which curve corresponds to He.


Molar mass He = 4.003 g/mol

Molar mass O2 = 32 g/mol


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Problem Details

Consider the following drawing.

A graph shows fraction of molecules versus molecular speed for gases A and B. Gas A peaks higher and to the left of gas B. The x axis is molecular speed and the y axis is fraction of molecules (both axes are unscaled). Gas A rises to a peak about two-thirds of the way up the y axis with the peak at about one quarter the length of the x axis. Gas B rises to a broad, lower peak about one third of the way up the y axis and about halfway across the x axis.

If curves A and B refer to two different gases, He and O2 at the same temperature, which curve corresponds to He?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Root Mean Square Speed concept. You can view video lessons to learn Root Mean Square Speed. Or if you need more Root Mean Square Speed practice, you can also practice Root Mean Square Speed practice problems.

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Based on our data, we think this problem is relevant for Professor Lapeyrouse's class at UCF.