Study the three different age pyramids, for human population given below and answer the questions that follow.(i) Write the names given to each of these age pyramids.
(ii) Mention the one which is ideal for human population and why?
Answers
Answer:
2 Mention the one which is ideal for human population and why?
Answer:
Explanation:
PCl_5\rightleftharpoons PCl_3+Cl_2PCl
5
⇌PCl
3
+Cl
2
at t=0 4 mol 0 0
at eq'm (4-0.8)mol 0.8 mol 0.8 mol
Volume of the container = 2 L
[\text{concentration of the component}]=\frac{\text{moles of the component}}{\text{volume in liters}}[concentration of the component]=
volume in liters
moles of the component
[PCl_5]=\frac{4-0.8 moles}{2}=1.6mol/L[PCl
5
]=
2
4−0.8moles
=1.6mol/L
[PCl_3]=\frac{0.8 moles}{2}=0.4mol/L[PCl
3
]=
2
0.8moles
=0.4mol/L
[Cl_2]=\frac{0.8 moles}{2}=0.4mol/L[Cl
2
]=
2
0.8moles
=0.4mol/L
Expression of K_cK
c
is written as:
K_c=\frac{[PCl_3]\times [Cl_2]}{[PCl_5]}=\frac{0.4\times 0.4}{1.6}=0.1K
c
=
[PCl
5
]
[PCl
3
]×[Cl
2
]
=
1.6
0.4×0.4
=0.1
The equilibrium constant will be 0.1.