Two 112-L tanks are filled with gas at 330 K. One contains
5.00 ...

Question

Two 112-L tanks are filled with gas at 330 K. One contains 
5.00 mol of Kr, and the other contains 5.00 mol of O2. 
Considering the assumptions of kinetic–molecular theory, 
rank the gases from low to high for each of the following 
properties. 
(b) Density (g/L)

Accepted Answer

Hi everyone. This problem reads. You have 25 liter sealed containers at 400 kelvin, one contains three moles of argon, while the other contains three moles of hydrochloric acid, which gas will have the higher density. So we want to know about density in relation to gasses and the equation that we're going to need is density is equal to pressure times molar mass over gas constant R times temperature. Okay, so in this case density will only depend on molar mass because for both gasses, they have the same volume temperature, moles and pressure. Okay, so because density we will only depend on molar mass. We need to write down the molar mass for each of our gasses. So our molar mass for argon is going to equal 39.948 g per mole. And we find this using the periodic table. And the molar mass for hydro biotic acid is equal to 127. g per mole. Okay, so density and molar mass have a direct relationship. Okay, so what that means is the higher the density. The higher the moller mass. Okay, and so looking at the two gasses, we see that our hydro biotic acid has the higher moller mass. So that means it's going to have the higher density. Okay, so in terms of our option choices, given, where asked which guests will have the higher density, the answer choice is going to be beat hydro biotic acid will have the higher density. That's it for this problem. I hope this was helpful

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