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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