Read the information from the table and answer the questions given below.
Name of the gas Hydrogen (H2) Oxygen (O2) Methane (CH4) Carbon dioxide (CO2)
Molecular mass 2 32 16 44
a) Which gas has least rate of diffusion?
b) In Oxygen and Carbon dioxide which gas spread easily?
c) Which gas diffuses rapidly. Why?
d) Arrange the gases in increasing order of diffusion rate
Answers
a) Carbon dioxide
b)Carbon dioxide spread easily.
c)At any given temperature, small, light molecules (such as H 2, hydrogen gas) diffuse faster than larger, more massive molecules (such as N 2, nitrogen gas) because they are traveling faster, on the average (see heat ; kinetic-molecular theory of gases ).
hope it will help you.
Answer:
ANSWER
Molecular masses of given molecule:-
H
2
<O
2
<CO
2
<SO
2
<Cl
2
2<32<44.01<64<71
Number of moles=
Molecularmass
Weight
[All gases are 8 gram]
(i) For H
2
:- Number of moles=
2
8
=4
Number of molecules= Number of moles × Avogadro number
=4×6.022×10
23
Number of molecules=24.088×10
23
(ii) For O
2
:- Number of moles=
32
8
=0.25
Number of molecules=0.25×6.022×10
23
=1.505×10
23
(iii) For Cl
2
:- Number of moles=
71
8
=0.11
∴ Number of molecules=0.11×6.022×10
23
=0.6624×10
23
It can be seen that Hydrogen gas has most number of molecules and chlorine gas least number of molecules.