12 (O2)=O2) 0.180 ×35.5kPa=20.0kPa 0.320 p(N2)=p-p(NH3)-p(O2) =(133.0-35.5-20.0)kPa =77.5kPa 返回主目录 返回次目录返回主目录 返回次目录 12 p(N2 )= p- p(NH3 ) - p(O2 ) =(133.0-35.5-20.0)kPa =77.5kPa 2 2 (O ) (O ) n p p n = 0.180 35.5kPa 20.0kPa 0.320 =  =