760mmg×101kPa 760mmg P作grh+ =9.807m/s2'1.30'10'kg×cm"30m+101kPa =3.03103kg×cm×s2+101kPa =303kPa+101kPa =404kPa P(O2)=21kPa o.02=x 92--品5 21 若混合气体体积为1.000L时，P=g r hw+ =9.807 m/s 2 ´1.30´10 3kg×cm -3´30m+101kPa =3.03´10 3 kg×cm -1× s -2 +101kPa =303kPa+101kPa =404kPa 若混合气体体积为 1.000L 时