Question

A gas has the density 2500g/cm³ diffuse with a rate of 30mL/min. Calculate the rate of the gas with density 3600g/cm³ in the same cylinder under same condition of temperature and pressure.

25
250
150
75
plz answer fastttttttttttttttt

Answer 1

Answer:

Rate of diffusion of hydrogen, R

1

=28.7cm

3

s

−1

Rate of diffusion of another gas, R

2

=7.2cm

3

s

−1

According to Graham’s Law of diffusion, we have:

R

2

R

1

=

M

1

M

2

where,

M

1

is the molecular mass of hydrogen =2.020g.

M

2

is the molecular mass of the unknown gas.

∴M

2

=M

1

(

R

2

R

1

)

2

=2.02(

7.2

28.7

)

2

=32.09g

32 g is the molecular mass of oxygen. Hence, the unknown gas is oxygen.