Question

A glass vessel contain air at 60degree centigrade to what temperature Must it be heated to expell 1/3 of air the pressure remaining constant

Answer 1

=186K(by Charle's law)
Hope my answer helped you.

Answer 2

According to dalton's law
rate of diffusion is directly proportional to square root of temperature.
r1/r2= (t1/t2)^-1/2
t2=9×60
=540