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kotykmax [81]
3 years ago
11

An acid base indicator is a dye that is:

Chemistry
1 answer:
-BARSIC- [3]3 years ago
3 0

<u>Answer:</u> The correct answer is Option d.

<u>Explanation:</u>

An indicator is defined as the substance which shows the presence of acid or a base in a solution. They change their color accordingly.

Acid-base indicators are usually weak acids or weak bases. They change their color in the solution with change in the pH.

<u>For Example:</u> Phenolphthalein is an acid-base indicator which remains colorless in acidic solution and changes its color to pink when added to basic solution.

Hence, the correct answer is Option d.

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Can an ether form hydrogen bonds in the same way as does an ester
belka [17]

Yes, an OH group from ethanol can form a hydrogen bond to the ether O atom in the same way as it can do so with the single-bonded O atom in the ester.

The O atom in the carbonyl group of the ester can also form H-bonds with ethanol.


5 0
3 years ago
WHOEVER CAN HELP MEEEEE SAY "I" AND I WILL GIV U MANY MANY POINTS, THANKS, BRAINLIEST!!!! PLSSSSSSSSS
Gwar [14]

1: Biosphere

2: Atmosphere

3: Hydrosphere

4: Atmosphere (I think?)

5: Stratosphere

6: Biosphere

7: Hydrosphere

8: Geosphere

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4 0
2 years ago
A 1.04L sample of gas of 759 mm Hg pressure is expanded
Marta_Voda [28]

Answer:

P2 = 352 mm Hg (rounded to three significant figures)

Explanation:

PV = nRT

where P is the pressure,

V is the volume,

n is the moles of gas,

R is the gas constant,

and T is the temperature.

We must relate this equation to a sample of gas at two different volumes however. Looking at the equation, we can relate the change in volume by:

P1V1 = P2V2

where P1 is the initial pressure,

V1 is the initial volume,

P2 is the final pressure,

and V2 is the final volume.

Looking at this relationship, pressure and volume have an indirect relationship; when one goes up, the other goes down. In that case, we can use this equation to solve for the new pressure.

P1V1 = P2V2

(759 mm Hg)(1.04 L) = P2(2.24 L)

P2 = 352 mm Hg (rounded to three significant figures)

8 0
2 years ago
A variable that is kept the same through the experiment to make the test fair
sveta [45]
It would be the controlled variable, which is a baseline to compare your other variables too.

Hope this helps!
3 0
3 years ago
What does the 4 mean in the formula4Na2SO3
Anon25 [30]

Answer:

4 means there are four molecules of Na₂SO₃.

Explanation:

Molecule:

A molecule is the smaller particle which can exist independently.

It may be monoatomic , diatomic, triatomic etc.

For example,

Hydrogen molecule consist of two atoms H₂

Nitrogen molecule = N₂

It may be combination of atoms of different elements.

HCl, H₂SO₄,Na₂SO₃

HCl = 1 mole of hydrochloric acid or one molecules of hydrochloric acid

H₂SO₄= 1 mole of sulfuric acid or one molecule of sulfuric acid

Na₂SO₃ = 1 mole of sodium sulfite or one molecule of sodium sulfite.

4Na₂SO₃ = 4 mole of sodium sulfite or four molecule of sodium sulfite.

The coefficient before the formula indicate the total number of molecules.

4 0
3 years ago
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