标况下V L气体为n = V/22.4 mol
其质量为MV/22.4 g
溶液质量 1000 ＋MV/22.4　（前者为1升水的质量）
溶液体积：（1000 ＋MV/22.4)/p mL = (1000 ＋MV/22.4)/(1000p) L
= (22400 + MV)/(22400p) L
c = (V/22.4)/[(22400 + MV)/(22400p)] = (22400pV)/[22.4(22400 + MV)]
= [ (22400pV)/22.4]/(22400 + MV)
= 1000pV/(22400 + MV) mol/L