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Mass density of a gas! 
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#1
Nov2811, 08:42 PM

P: 34

1. The problem statement, all variables and given/known data
At 0 degrees, and 1 atm, 0.6 mol of a gas occupies a volume of 0.0134 m^3. what is the mass density? The number density is 2.69x10^25 m3, the average distance between the gas molecule is 4nm and the total mass is 17.685g. 2. Relevant equations n=N/Na 1u=1.66x10^27 mol1 3. The attempt at a solution I tried to find N so I did 0.6/6,022x10^23 and got 9.96x10^25. Then I multiplied this by 2.69x 10^25 and go 2.68x10^49 which was wrong. I'm not exactly sure how to solve the problem, so any help is appreciated! 


#2
Nov2811, 08:52 PM

Emeritus
Sci Advisor
PF Gold
P: 5,196

molecules/mol), which you can see gives you a result in "molecules." Always include units in calculations like this in order to catch errors like this. 


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