100克空气中含多少克氮气氧气

题目

100克空气中含多少克氮气氧气
Pn3=1.25g/L,P空气=1.293/L,Po2=1.429g/L
求如题100克空气中含多少g氮气氧气

答案

V空=100/1.293
V氮气=V空*0.78(体积占的百分比)
V氧气=V空*0.21(体积占的百分比)
m氮气=V氮气*1.25g/L=75.41G
m氧气=V氧气*1.429g/L =23.21G
N2=75.41G
O2=23.21G