One mole of gas A and three moles of a gas B are placed in flask of volume 100 litres at 27°C. Calculate the total partial pressure of the gases in the mixture.

Options

A. 1.0 atm.
B. 0.9 atm
C. 0.985 atm
D. 10.850 atm

Answer

C

Explanation

Total pressure, `P=(nRT)/V=(4xx0.0821xx300)/100=0.985atm`
`P_(A)=(n_(A))/(n_(A)+n_(B)).P=1/4xx0.985=0.246` atm
`p_(B)=(n_(B))/(n_(A)+n_(B)).P=3/4xx0.985=0.739atm`
Total partial pressure (`P_(A)+ P _(B)` ) = 0.985 atm.