Solving Pressure Problem for Interstellar Hydrogen Gas

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The discussion focuses on calculating the pressure of interstellar hydrogen gas clouds with given densities and temperatures using the Ideal Gas Law. Participants express uncertainty about determining the volume and number of moles needed for the calculation. It is clarified that any representative sample of the gas cloud can be used for the pressure calculation. The conversation emphasizes the lack of specific constraints in the problem statement regarding sample selection. Ultimately, a convenient sample size for analysis is suggested to facilitate the calculation.
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Homework Statement



Clouds of interstellar hydrogen gas have densities of up to 1.0 X 10^10 atoms/m^3 and temperatures of up to 1.0 X 10^4 K. What is the pressure in such a cloud?



Homework Equations



Ideal-Gas Law: pV=nRT



The Attempt at a Solution



I don't know how to find the volume or number of moles for the equation.

Please help.
 
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qspartan570 said:

Homework Statement



Clouds of interstellar hydrogen gas have densities of up to 1.0 X 10^10 atoms/m^3 and temperatures of up to 1.0 X 10^4 K. What is the pressure in such a cloud?



Homework Equations



Ideal-Gas Law: pV=nRT



The Attempt at a Solution



I don't know how to find the volume or number of moles for the equation.

Please help.

Within the cloud is there anything to distinguish one sample volume from another?
 
gneill said:
Within the cloud is there anything to distinguish one sample volume from another?

I don't really know.
 
qspartan570 said:
I don't really know.

Is there anything in the question that would suggest that anything but a representative sample is to be considered?
 
gneill said:
Is there anything in the question that would suggest that anything but a representative sample is to be considered?

No there is not anything within the question other than what is stated above.
 
qspartan570 said:
No there is not anything within the question other than what is stated above.

So any sample of the cloud will do, right? What would be a convenient size of sample?
 

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