Which of the gases in the graph below has the largest molar mass?

Question

Accepted Answer

Welcome back. Alright, so which of the following statements is our true based on the figure below. So, we're looking for a true statement, assume that we are at constant temperature. All right, so let's take a look at this graph here. So we have molecular speed versus relative number of molecules. So this is just speed of the molecules, Right? And then a relative relative number of molecules. So we can think of that as mass or molar mass. Right? So mass. So here we have four different gasses, gas, A, B, C, and D. And the statements here have to do with the molar masses, which one has the largest and which one is slower or faster. So we're going to say that um the smaller the mass or the smaller the smaller mass, the faster the the molecules are going to be moving. Right? So they're going to be faster. So the molecular speed will be faster. The smaller you waste. So smaller relative number of molecules, the faster the molecular speed. Okay, so the first one says gas, t. Has the largest Mueller mass. So, ghastly is this one right here has the largest smaller mass. If we take a look at the molecular speed. Um Over here we actually have um the molecular speed for d is actually faster, Right? It's it's faster here. Anyone point it looks like it's faster relative to the number of molecules. So we're actually going to say that d has the smallest Mueller mass. Alright, so this is this is the smallest one. So this is false. Um Second one. Gas B has larger molar mass and gas C. So we're comparing B and C. Alright, so be actually is higher on the Y axis than C. So we're going to say that it's actually a larger mass. So gas B has larger molar mass density. So that is actually correct. That is a correct statement. So this one is true and then finally third one, every molecule of gas A. Is slower than every molecule of gas at D. So we already said that D. Here has the smaller smaller mass and it's the fastest one compared to A. That has the largest mass and it's going to be the slowest one. Right? But with this statement is saying is that every single molecule of a slower than every single molecule of deep these speeds are relative. Right? So molecular speed, this is going to be relative speed. Or actually I'm sorry not relative but average speed. We can't actually know the speed of every single molecule. We just know the average of all of them. Okay, so saying that every single molecule of A is slower than D. Is not correct. We're not really sure now. The average speed of A is going to be slower than average speed of D. But not of every single molecule because that's not always going to be true because one or two molecules are going to be faster than D in some instances. So this is going to be false. So it looks like the second one is the only true statement, and we're going to say be here is our final answer. So to only is the only one that has true statements. Alright folks, we are done here. Thanks so much for watching.

Which of the gases in the graph below has the largest molar mass?

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