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Lorico [155]
3 years ago
5

Which statement best describes the difference between a physical change and a chemical change?

Chemistry
2 answers:
masya89 [10]3 years ago
7 0

Answer: Option (b) is the correct answer.

Explanation:

A change that does not lead to any difference in chemical composition of a substance is known as a physical change.

For example, shape, size, mass, volume, density, boiling point, etc of a substance are all physical properties.

On the other hand, changes that lead to bring change in chemical composition of a substance is known as a chemical change.

For example, exploding dynamite, rotting cheese, combustion, oxidation etc are all chemical changes.

Thus, we can conclude that the statement a physical change is a change from one state of matter to another; a chemical change results in a new substance formed, is correct.

Helen [10]3 years ago
5 0

Answer:

The answer is letter C

Explanation:

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Explanation:

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3 years ago
What is the transfer of electrons in Al + Cl = AlCl3
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Answer:

3 e⁻ transfer has occurred.

Explanation

This is a redox reaction.

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  • Reduction (gain of electrons or decrease in the oxidation state of the entity)
  • An element undergoes oxidation or reduction in order to achieve a stable configuration. It can be an octet or duplet configuration. An octet configuration is that of outer shell configuration of noble gas.
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This reaction can be rewritten, by clearly mentioning the oxidation states of all the entities involved.

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Here, Aluminum is undergoing an oxidation(i.e loss of electrons) from: 0→(+3)

Chlorine undergoes a reduction half reaction (i.e gain of electrons) from: 0→(-1). There are 3 such chlorine atoms, hence 3 e⁻ transfer has occurred.

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Answer:

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From the question given:

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