Oxygen and cyclopentane at partial pressure of 570 torr and 170 torr respectively are mixed in a gas cylinder . The ratio of the number of moles of cyclopentane to the number of moles of oxygen is:
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PT=PO2+PCP
=570+170
=740torr
Partial pressure of cyclopentane = PT× mole fraction of cyclopentane
Partial pressure of O2 = PT× mole fraction of O2
PCPPO2=PT×mole fraction of cyclopentanePT×mole fraction of O2=molesofcyclopentanemolesofO2
∴MoleofcyclopentaneMoleofO2=PCPPO2
=170570
=0.30
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