A closed vessel contains equal number of nitrogen and oxygen molecules at a pressure of p mrn. If nitrogen is removed from the system then the pressure will be

In a vessel, Number of N2 molecules = Number of O2 molecules  i.e. number of moles of N2= number of moles of O2 Mole fraction of N2= Mole fraction of O2 Partial pressure of N2= Partial pressure of O2=p2 mm When N2 is removed then only O2 molecules exerted the pressureptotal =pO2=p2 mm