Answer:
The pH of the solution lies from 11 to 12.Hence, option e is correct.
Explanation:
The value of
for caffine = ![4\times 10^{-4}](https://tex.z-dn.net/?f=4%5Ctimes%2010%5E%7B-4%7D)
![CafOH(aq)\rightleftharpoons Caf(aq)+OH^-(aq)](https://tex.z-dn.net/?f=CafOH%28aq%29%5Crightleftharpoons%20Caf%28aq%29%2BOH%5E-%28aq%29)
Initial
0 0.01 M 0
AT equilibrium:
x (0.01 -x)M x
![K_b=\frac{x(0.01-x)}{(x)}](https://tex.z-dn.net/?f=K_b%3D%5Cfrac%7Bx%280.01-x%29%7D%7B%28x%29%7D)
![4\times 10^{-4}=\frac{x(0.01-x)}{(x)}](https://tex.z-dn.net/?f=4%5Ctimes%2010%5E%7B-4%7D%3D%5Cfrac%7Bx%280.01-x%29%7D%7B%28x%29%7D)
Solving for x:
x = 0.0096 M
The pOH of the solution is given by :
![pOH=-\log[OH^-}](https://tex.z-dn.net/?f=pOH%3D-%5Clog%5BOH%5E-%7D)
![pOH=-\log[x]](https://tex.z-dn.net/?f=pOH%3D-%5Clog%5Bx%5D)
![pOH=-\log[0.0096]](https://tex.z-dn.net/?f=pOH%3D-%5Clog%5B0.0096%5D)
pOH = 2.02
pH= 14 - pOH = 14 - 2.02 = 11.98
The pH of the solution lies from 11 to 12.
Air is a natural resource, true
Answer:
The original volume of the gas is 0.001 mL
Explanation:
This easy excersise can be solved by the law for gases, about pressure and volume; the volume of a gas is inversely proportional to the pressure it exerts.
We can propose the rule by this formula:
P₁ / V₁ = P₂ / V₂
We replace data given: 1.50 atm / V₁ = 0.50 atm / 750 mL
As the rule says, that volume is inversely proportional, and the pressure was decreased, volume must be lower than 750 mL.
1.5atm / (0.5 atm / 750mL) = V₁
V₁ = 0.001 mL
Opinions are differ from facts as that we cannot change the facts but opinions can be changed as in first example it is given anthracite is better than bituminous coal may be there is another coal which is more better than anthracite. So here opinion is changed.
<h3>What is Coal ?</h3>
It is a black or brownish black sedimentary rock. It contains Sulphur, hydrogen, oxygen, carbon etc. It is always preferred as fuel. Coal was formed millions years ago when plant decay in the soil. It is obtained from dead vegetation. It is obtained from dead plants matter decay into peat and then it is converted into the coal by the process of heat.
<h3>What is Solar System ?</h3>
Solar System is made up of all the planets that revolve around our Sun. Solar System contains eight planets. These planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
Thus from the above conclusion we can say that Opinions are differ from facts as that we cannot change the facts but opinions can be changed as in first example it is given anthracite is better than bituminous coal may be there is another coal which is more better than anthracite. So here opinion is changed.
Learn more about the Coal here: brainly.com/question/16607139
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