A gas cylinder contains 55% nitrogen, 20% oxygen and 25% carbon dioxide by mass, at 760 mm pressure. Calculate the partial pressure of each gas.

Explanation

Total mass of the gases = 100g
`W_(N_(2))= 55g, W_(O_(2)) = 20 g, W_(CO_(2))= 25g`
`n_(N_(2))=55//28=1.964, n_(O_(2)) = 20 //32 = 0.625`,
`n_(CO_(2)) = 25 //44 = 0.568`
Total moles `=3.157`
`P_(N_(2)) =(1.964xx 760)/(3.157)= 472.8 mm`
`P_(O_(2)) = (0.625xx 760)/( 3.157) = 150 . 46mm`
`P_(CO_(2)) = ( 0.568 xx 760 )/( 3.157 ) =136.74mm`