Question

the rate of diffusion of unknown gas and chlorine is 6:5 assuming molecular weight of chlorine is 36 calculate molecular weight of unknown gas​

Answer 1

Answer:

Answer:

50

Explanation:

From Graham's Law of Diffusion,

We know,

The rate of diffusion of a gas is inversely proportional to the square root of molecular weight of the gas.

So, We get,

r

∝

1

√

M

From that, we get,

r

1

r

2

=

√

M

2

M

1

....................................(i)

Now, We know,

Molecular Weight

=

2

×

Vapour Density

.

So, Average Molecular Weight of Chlorine =

2

×

36

=

72

Now, From (i),

×

x

6

5

=

√

72

M

unknown

⇒

36

25

=

72

M

unknown

[Squaring both sides]

⇒

25

36

=

M

unknown

72

⇒

M

unknown

=

25

⋅

72

2

36

⇒

M

unknown

=

50

So, The Molecular Weight of the Unknown Gas is

50

.

Hope this helps.