Which equations shows the complete dissociation of a strong base? HCl -> cl- + H+

HNO2 -> H+ + NO2-

HA + h20 -> A- + H+ + h20

BOH + h20 -> B+ + OH- + H20

Answers

Answer 1

Answer: The correct answer is the fourth option. The complete dissociation of a strong base is BOH + h20 -> B+ + OH- + H20 since this is the only base from the choices given. A base is a substance that accepts hydrogen ions.

Answer 2

Answer:

Answer : The correct option is, (4) $BOH+H_20\rightarrow B^++OH^-+H_20$

Explanation :

Strong acid : Strong acids are those acids which are completely dissociates into ions in water. It dissociates into hydrogen ion and an anion.

Strong base : Strong base are those base which are completely dissociates into ions in water. It dissociates into hydroxide ion and a cation.

In all the given options, option (4) $BOH+H_20\rightarrow B^++OH^-+H_20$ equation shows the complete dissociation of a strong base.

While the other options shows the complete dissociation of an acid.

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Match the following definition to the type of solution it describes. unsaturated solution
saturated solution
supersaturated solution

A.
The amount of solute dissolved is less that the maximum amount the solution can hold.
B.
The amount of solute dissolved is the maximum amount the solution can hold.
C.
The amount of solute dissolved is more than the usual maximum amount.

Answers

unsaturated solution is The amount of solute dissolved is less that the maximum amount the solution can hold.

saturated solution is The amount of solute dissolved is the maximum amount the solution can hold.

supersaturated solution is The amount of solute dissolved is more than the usual maximum amount.

Define physical change and chemical change and give examples of each type of change

Answers

Physical change does not change the composition of the substance for example: water to ice, evaporation of gasoline

Chemical change does change the composition of the substance for example: leaves changing color in fall, when you burn wood or gasoline

Which of the following elements has the strongest attraction for electrons? a. oxygen
b. sulfur
c. aluminum
d. boron

Answers

The strongest attraction for electrons has been found in Sulfur. Thus, option B is correct.

The electrons are the subatomic particles revolving around the nucleus in the atom. The number of electrons in an atom has been responsible for the reactivity of the atom.

Strongest attraction of electrons

The number of electrons in the elements has been different. The element with higher number of electrons tends to have higher force of attraction toward the last electron, and thus have high ionization energy.

The number of electrons in the following elements has been:

Oxygen = 8
Sulfur = 16
Aluminum = 13
Boron = 5

The maximum attraction for electrons has been found in Sulfur. Thus, option B is correct.

Learn more about electrons, here:

brainly.com/question/1255220

c.aluminium

Although the strongest metals are alloys, made up of more than 1 metal (like steel).

What part of a divers body is most effected by pressure?

Answers

The lungs are most affected by the pressure.
It makes breathing difficult pressure get higher and it compresses the diver's lungs.

Which statement describes one characteristic of an operating electrolytic cell?(1) It produces electrical energy.
(2) It requires an external energy source.
(3) It uses radioactive nuclides.
(4) It undergoes a spontaneous redox reaction.

Answers

The answer is (2). The electrolytic cell mechanism is to convert the electrical energy to chemical energy. So it need external energy source. And there is a similar one called voltaic cell which will convert the chemical energy to electrical energy.

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