2 years ago

What animal did Darwin study in the Galapagos Islands?

Chemistry

2 answers:

Gennadij [26K]2 years ago

8 0

Answer:

The answer is 4.

Explanation:

Finches.

7nadin3 [17]2 years ago

3 0

Answer:

4. Finches

Darwin studied the forms of the beak, and found that they were different based on what they ate.

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Meiosis goes through 2 divisions to create four unique haploid cells. true or false

Aleksandr [31]

Answer:

True

Explanation:

True is the ANSWER.

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2 years ago

A metal sample has a mass of 64.2 g. What is the density of this metal?

brilliants [131]

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3 years ago

How is milk souring a chemical change?

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3 years ago

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3 years ago

When a aqueous solution of a certain acid is prepared, the acid is dissociated. Calculate the acid dissociation constant of the

stepan [7]

<h2> $K_a$ = $\dfrac{[H^{+}] [A^{-}]}{[HA]}$ </h2>

Explanation:

When an aqueous solution of a certain acid is prepared it is dissociated is as follows-

${\displaystyle {\ce {HA$ ⇄ ${H^+}+{A^{-}}} }}$

Here HA is a protonic acid such as acetic acid, $CH_3COOH$

The double arrow signifies that it is an equilibrium process, which means the dissociation and recombination of the acid occur simultaneously.

The acid dissociation constant can be given by -

$K_a$ = $\dfrac{[H^{+}] [A^{-}]}{[HA]}$

The reaction is can also be represented by Bronsted and lowry -

$\\{\displaystyle {\ce {{HA}+ H_2O}$ ⇄ $[H_3O^+] [A^-]$

Then the dissociation constant will be

$K_a$ = $\dfrac{[H_3O^{+}] [A^{-}]}{[HA]}$

Here, $K_a$ is the dissociation constant of an acid.

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4 years ago