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A gas cylinder holds 85g of a gas X . The same cylinder when filled with hydrogen holds 8.5g of hydrogen under the same conditions of temperature and pressure.calculate the molecular weight of X.

Asked by Nilesh Raikar 26th July 2012, 12:47 PM
Answered by Expert
Answer:

Since the cylinder has same conditions of temperature and pressure for both the gases X and Hydrogen so, from the ideal gas equation we can infer that,

    n1=n2

Where, n1=number of moles of gas X = mass in system/Molecular Mass

                                                     = 85 / Molecular Mass

n2=number of moles of hydrogen = mass in system/Molecular Mass = 8.5 / 2

Molecular Mass = (85 x 2) / 8.5

Molecular Mass of gas X = 20 g/mol

 

Answered by Expert 27th July 2012, 11:45 AM
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