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BabaBlast [244]
3 years ago
15

What is Chemical substance?​

Chemistry
1 answer:
Solnce55 [7]3 years ago
7 0

Answer:

A chemical substance is any material that has a definite chemical composition. Moreover, a pure substance cannot be separated into other substances by any mechanical process.Chemical elements and compounds are substances, mixtures are not.

Explanation:

hope this helps

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An amino acid is usually more soluble in aqueous solvent at pH extremes than it is at a pH near the isolelectric point of the am
gogolik [260]

Answer:

Option B. At pH extremes, the amino acid molecules mostly carry a net charge, thus increasing their solubility in polar solvent.

C. At very low or very high pH, the amino acid molecules have increased charge, thus form more salt bonds with water solvent molecules.

Explanation:

4 0
3 years ago
Salt dissolved in water is a solution, therefore _____.
saveliy_v [14]

Answer: Correct options are as follows.

  • salt is not chemically bonded to water.
  • salt and water retain their own chemical properties.

Explanation:

When salt is dissolved in water then it means that it is a physical change as salt has completely dissociated into ions but they are not chemically combined to the water molecules.

As a result, both salt and water will retain their chemical properties.

For example, NaCl when dissolved in water will dissociate as follows.

           NaCl \rightarrow Na^{+} + Cl^{-}

Only the particles of salt have evenly distributed in water.

And, when a components of a salt chemically combine with another substance then it will form a new compound.

Therefore, we can conclude that salt dissolved in water is a solution, therefore:

  • salt is not chemically bonded to water.
  • salt and water retain their own chemical properties.
4 0
3 years ago
Why is conical flask used in the freezing point of naphthalene activity?
SpyIntel [72]

Answer:

D. To ensure the cooling process is not affected by surrounding temperature

Explanation:

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6 0
3 years ago
When swimmers get out of the pool and sit in the sun, their wet skin dries quickly. What happens to the water?
I am Lyosha [343]

Answer:

It evaporates and moves into the air.

Explanation:

When water is left out for a while, it evaporates into the air! :)

7 0
3 years ago
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How is inoic and molecular solids differ from each other in solution
Irina18 [472]
Molecular are only between non-metals. Ionic has a higher melting point
4 0
4 years ago
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