pl solve this question?? Share with your friends Share 0 Chirag Gupta answered this Dear Student By Boyle's Law, we know that, PV = Constant (at constant Temperature)When the two gases are mixed together, the volume becomes the sum of two volumes mixing, that is: PfVf=P1V1+P2V2Pf=P1V1+P2V2V1+V2Pf= =(400×150)+(840×400)(150+400)=720 mmHence the total pressure observed by mixing is 720 mm.Regards 0 View Full Answer