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3 years ago

12

When OH- and H+ ions are brought together, they quickly combine to form water molecules.

1 answer:

Alik [6]3 years ago

5 0

True because positive and negative ions makes neutral hence the water is neutral

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Nuclear energy is released during:

kondaur [170]

B, C and E. In radioactive decay unstable atoms stabilize by releasing energy.

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3 years ago

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Which statement describes a scientific theory?

vichka [17]

Best Answer
C) is the best description, although a scientific theory is not necessarily a "fact". They are, however, based on evidence.

A) is complete garbage.

B) is a good description of a scientific "law"- something that predicts how a certain event will occur without explaining why this is (for instance, the law of gravity accurately describes the gravitational forces between two bodies, but does not explain why these forces are there).

D) is a scientific "hypothesis"- an explanation for an observed phenomena that is yet to be proven.

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4 years ago

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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

Nucleic acids are chains of 5-carbon sugars linked by ____ bonds with an organic base protruding from each sugar.

Mekhanik [1.2K]

<span>B) phosphodiester </span> is the correct answer

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4 years ago

I would be so grateful if someone helped me with my lab report. My lab report is about identifying unknown solids.

kipiarov [429]

Answer:

good afternoon

Explanation:

like that you dummy

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3 years ago