Answer:
Explanation:
The first attached diagram shows the proposed phenol that is being treated with KOH to form Oxonine (CₐHₐO).
Reaction of Arylhalide after treatment with KOH lead to the displacement of Bromine atom with the hydrogen from the hydroxyl (OH) substituent , then forming HBr , leaving the oxy (-O) atom alone to form an Oxonine compound.
Therefore the propose structure for the product (Oxonine) CₐHₐO is shown in the second diagram attached below.
I'd keep it simple and say periodic table.
Answer:
The reason why the imidazole side chain of histidine can function as either acid or base catalyst is: I and II: Option A.
Explanation:
The imidazole group of the histidine has a pKa of 6.0, which is closer to the pKa of the physiological environment. Thus, at every reaction, either acidic or basic, the side chain act as a buffering catalyst, which can be useful irrespective of the pH of the reactants. Also, since the reaction of a catalyst is influenced by the pH of the environment, at physiological pH, the sulfur in the ring can be protonated by acidic reaction or deprotonated by the primary reaction within the physiological environment.
Answer:
B is the answer.
Explanation:
If you've ever dropped something in water, or done an experiment like that, you would know. The force of gravity pulling the object down while its still in the air, once the object hits the water, its all up to density to see if it goes to the top, or goes/stays at the bottom.
D) the time it takes light to travel from Earth to the Sun.