A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen . What would be the partial pressure of dihydrogen in bar ?

A mixture of dihydrogen and dioxygen at one bar pressure contains 20%

1.	A mixture of dihydrogen and dioxygen at one bar pressure contains 20% by weight of dihydrogen . What would be the partial pressure of dihydrogen in bar ?
Answer» SOLUTION :Suppose the total MASS of the MIXTURE is 100 g. `:. " Mass of " H_2 = 20 g, " Mass of " O_2` `= 100 - 20 = 80 g` NUMBER of moles of `H_2 = 20/2 = 10` Number of moles of `O_2 =80/32 =2.5` Total number of moles in the mixture = `10 + 2.5 = 12.5` `:. " Partial pressure of " H_2 = ("Moles of " H_2)/(" Total no. of moles")XX " Total pressure "`. `=10/(12.5)= 0.8` bar