Question

3
1.81 20 dm of an unknown gas diffuse through a
porous partition in 60 s, whereas 14.1 dm of O2
under similar conditions diffuse in 30 s. What is the
molecular mass of the
(Ans. 63.62
gas?​

Answer 1

Answer:

Rate of diffusion of SO

2

=

60

20

dm

3

s

−1

Rate of diffusion of O

2

=

30

V

dm

3

s

−1

According to Graham's law of diffusion,

(20/60)

(V/30)

=

M

O

2

M

SO

2

=

32

64

V=14.1 dm

3

.