Potassium hydroxide is classified as an Arrhenius base because KOH contains(1) OH- ions (2) O2- ions (3) K+ ions (4) H+ ions

Answers

Answer 1

Answer:

Answer : The correct option is, (1) $OH^-$ ions.

Explanation :

According to the Arrhenius concept, an acid is a type of substance which ionizes in water to gives $H^+$ ions (hydronium ions or hydrogen ions) and a base is a type of substance which ionizes in water to gives $OH^-$ ions (hydroxide ions).

As we know that KOH is a base which ionizes in water to gives $OH^-$ ions (hydroxide ions) and $K^+$ ions.

Hence, potassium hydroxide is classified as an Arrhenius base because KOH contains $OH^-$ ions.

Answer 2

Answer: The answer is (1)OH- ions. The base has more OH- ions while the acid has more H+ ions. And if you dissolve them into water, the pH of the solution is also different. Base has pH>7 and acid has pH<7 at room temperature.

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Is it possible for an object not to be in motion and still have force acting upon it?

Answers

yes,this is an example:
An apple is sitting on a desk he is not in motion but one of the forces acting upon it is gravitational pull because is not floating around, the earth gravitational pull is pulling it down to the earth's surface.

What does N2O3 mean in science

Answers

2 nitrogen and 3 oxygen atoms share a covalent bond, making dinitrogen trioxide

n2o3 is dinitrogen trioxide

A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?(1) 5l.1 kPa(2) 216 kPa(3) 243 kPa(4) 274 kPa

Answers

4. This problem is really simple if you realize that you can use the combined gas law:

P1V1/T1 = P2V2/T2

Therefore, just substitute in and solve:

(105 kPa)(220.0 mL)/(275K) = ?kPa(95.0 mL)/(310 K)
Solve for ?
Answer is 274. kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

What is Combined gas law?

Combinedgas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

Initial volume V₁ = 220.0mL = 0.22L

Initial pressure P₁ = 105kPa = 1.03627atm

Initial temperature T₁ = 275K

Final volume V₂ = 95.0mL = 0.095L

Final temperature T₂ = 310K

Final pressure P₂ = ?

To calculate the new temperature of the gas, we substitute our given values into the equation above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = (P₁V₁T₂) / V₂T₁

P₂ = ( 1.03627atm × 0.22L × 310K ) / ( 0.095L × 275K )

P₂ = 70.673614LatmK / 26.125LK

P₂ = 2.705atm

P₂ = (2.705 × 101.325)kPa

P₂ = 274 kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

Learn more about the combined gaslaw here: brainly.com/question/25944795

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When determining whether a chemical reaction has taken place you observe and look for several indicators. Which would be considered an indication that a chemical reaction or chemical change has taken place? es -) A) Solid melts. B) Heat is given off. Substance dissolves D) Substance changes shape. Physical Science

Answers

Answer:

B) Heat is given off.

Explanation:

When heat is given off, a chemical change must have occurred and such a reaction is termed an exothermic reaction.

A chemical change is one in which;

the process is not easily reversible
leads to the production of new kinds of matter
involves change in mass
requires a considerable amount of energy.

Most chemical reactions are accompanied by heat changes.

What is the most important role that water plays for living organismsA.all organisms need water to stay clean
B. all organisms need water to transport water into their cells
C.all organisms need water as an energy source
D.all organisms live in water

Answers

All organisms need water to transport chemicals into their cells.

Answer:

All organisms need water to transport chemicals into their cells.

Explanation:

Solutions are a mixture of 2 or more compounds
true or false

Answers

True. It Is True Example -Lemon Juice And Water

The answer is true i think

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