Answer:
The value for the equilibrium constant for the reaction at 298K .
What would be the value for the equilibrium constant for the following reaction at the same temperature?
Explanation:
The Kc value for the reverse reaction of the first reaction that is:
For the reverse reaction,
So, it is the inverse of the first Kc value.
Hence, the new Kc value is:
Answer is :
Kc=2.5*10^-25.
Answer:
pH = 2.25
Explanation:
pH is a measurement in chemistry defined as the -log [H₃O⁺]. Molarity [], is defined as the ratio between moles of solute (HCl) and the liters of solution
To solve this question we must find the molarity of the H₃O⁺ knowing: [HCl] = [H₃O⁺]
[HCl]:
0.0084moles / 1.500L
= 0.0056M = [HCl] = [H₃O⁺]
pH = -log [H₃O⁺] = -log [0.0056M]
<h3>pH = 2.25</h3>
The number of electrons in the valence shell determines conductivity. Metals, for instance, have a gap in their valence shell. This makes it simple to stimulate electrons so they can switch bands. There are no open electron sites in the outer shell of semiconductors and insulators.
For this to happen, an electron must have sufficient energy to cross into a different band. Consequently, a wider gap must be filled, using more energy. The band gap of insulators is wider than that of semiconductors. Therefore, the conductivity of a material has a direct relationship with the band gap size.The ability of water to conduct an electrical current is measured by its conductivity. Conductivity rises with salinity because dissolved salts and other inorganic compounds carry electrical current. Oil and other organic materials have a low electrical conductivity in water because they do not conduct electricity well. Temperature also has an impact on conductivity; the higher the conductivity, the warmer the water. Conductivity is a helpful indicator of water quality in general.
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Answer: Option (b) is the correct answer.
Explanation:
According to the law of conservation of energy, it is known that energy can neither be created nor it can be destroyed.
But energy can be changed from one form to another.
Whereas entropy is the degree of randomness present within the molecules of a substance or object.
For example, gas molecules are able to move rapidly so, they have more entropy as compared to solid and liquid substances.
According to second law of thermodynamics, entropy of the system is always increasing.
Thus, we can conclude that "Conservation of energy" refers to the fact that energy cannot be created or destroyed but can be converted from one form to another.
<span>A) This solution was not basic when it was heated in part 3. ( in part 3 i convertedCu(OH)2 to CuO).
Incorrectly low, because not all copper compounds will precipitate out
B) A slightly blue solution was decanted from Cu in part V. (in part 5 i reduced Cu(H20)6 ions with zink)
Incorrectly low, because some copper were thrown away
C) In part 5 the water in the beaker boiled away, exposing the evaporating dish to excess heat (same as above).
incorrectly high, because other compounds might be present as well </span>