Problem: The density of a gas of unknown molar mass was measured as a function of pressure at 0 oC, as in the table below. Pressure (atm)1.000.6660.5000.3330.250 Density  (g/L) 2.30741.52631.14010.75710.5660Why is d / P not a constant as a function of pressure?

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We are asked why is d / P not a constant as a function of pressure.


In ideal conditions, d/P should be constant.

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Problem Details
The density of a gas of unknown molar mass was measured as a function of pressure at 0 oC, as in the table below.


 Pressure 




(atm)1.000.6660.5000.3330.250
 Density 




 (g/L2.30741.52631.14010.75710.5660


Why is d / P not a constant as a function of pressure?

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Our tutors have indicated that to solve this problem you will need to apply the Ideal Gas Law Density concept. If you need more Ideal Gas Law Density practice, you can also practice Ideal Gas Law Density practice problems.