T=2.725 +/- 0.001 K ≈ 3K
A: 3 K
Vitamin A is an essential vitamin that the body needs for growth and development. It is also vital for cell recognition, vision, immune function, and reproduction.
It also helps the heart, lungs, kidneys, and other organs function correctly.
Vitamin A deficiency is rare in the United States. If it happens, it can lead to eye problems, including night blindness.
In this article, learn more about the types of vitamin A, what vitamin A does, and some good sources of it.
HClO₄ + KOH → KClO₄ + H₂O
HClO₄ - perchloric acid
KOH - potassium hydroxide
Answer: FOUR <span>asymmetric centers are present in the open chain form of the Aldohexose d-(-)-Gulose.
Explanation: Here the word
Asymmetric center means those carbon atoms which contains atoms or group of atoms different from each other. All the
four atoms or group of atoms attached to carbon atom are different and have different molecular masses. Such carbon atoms are also called as
Chiral carbons. The structure of </span>d-(-)-Gulose is drawn below, and all Four Asymmetric centers are pointed by "
* "
The addition of magnesium chloride to the solution results in unaffected chemical equilibrium of the system. Thus, option A is correct.
The given chemical equation has been:

The reaction is reversible and can be converted back to the reactant with the increase in the product concentration. The equilibrium has been the condition when the concentration of products and reactants in the reaction are equal.
With an increase in products or reactants, there has been a corresponding chemical shift in the equilibrium.
The addition of Magnesium chloride in the solution, results in the dissociation of compound as:

The compound results in neither the increase of reactants, nor increase of product concentration in the acetic acid equilibrium.
Thus, the equilibrium of the system will remain unaffected by the addition of magnesium chloride. Thus, option A is correct.
For more information about equilibrium shift, refer to the link:
brainly.com/question/25964464