Each reation releases or absorbs a very large amount of energy per atom.
2 answers:
Answer: Option (D) is the correct answer.
Explanation:
A chemical reaction is defined as a reaction that involves exchange of electrons between the combining atoms. Not every chemical reaction releases or absorbs a very large amount of energy per atom.
On the other hand, a reaction that involves change in atomic nuclei of an atom either by splitting or combining of two atomic nuclei is known as a nuclear reaction.
For example,
Nuclear fission is a reaction in which a large nucleus splits by absorption of energy into two atomic nuclei. Nuclear fusion is a reaction in which two atomic nuclei combine together to result in the formation of a large atomic nuclei along with release of energy.
Each nuclear reaction releases or absorbs a very large amount of energy per atom.
Therefore, we can conclude that each nuclear reaction releases or absorbs a very large amount of energy per atom.
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<u>Answer:</u> The pH of the cleaning compound is 10.44
<u>Explanation:</u>
pH is defined as the negative logarithm of hydrogen or hydronium ion concentration that are present in a solution.
The equation representing pH of the solution follows:
We are given:
Putting values in above equation, we get:
Hence, the pH of the cleaning compound is 10.44
Answer:
Option b. Sodium chloride.
Explanation:
Consider the dissociation equilibrium of in water:
.
By the Le Chatelier's Principle, increasing the concentration of either product will shift the equilibrium to the left. Some that was initially dissolved will precipitate out of the solution. This effect is called the common-ion effect.
For this solution, the products of dissociation are
ions, and
ions.
Adding either to the solution will trigger the common-ion effect and reduce the solubility of .
In the two choices,
- Sodium chloride
will add
and
- Sodium fluoride
will add
ions to the solution.
contains
ions. It is capable of triggering the common-ion effect. However
contains neither
ions nor
ions. It will not trigger the common-ion effect.