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stiks02 [169]
2 years ago
7

Help pls i give 20 points

Chemistry
1 answer:
Sveta_85 [38]2 years ago
6 0
1. Physical- it is just changing states it’s still gold.
2. Chemical - oxidation is occurring which is a chemical change
3.chemical- when metal rusts it changes into iron oxide which is different than regular iron.

I’m not sure about the other 3. Sorry :( but I hope this kind of helps
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A. Explain, in terms of particles, why NaCl(s) does not conduct electricity.
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Answer:

Ionic bonds hold charged particles in solid NaCl together, such that they are unable to move or conduct electricity.

Explanation:

Consider an electric current that flows through a conductor: charge moves in a uniform direction from one end of the conductor towards the other.

Thus, there are two conditions for a substance to conduct electricity:

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A conductor of electricity shall meet both requirements.

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Inside solid NaCl \rm NaCl\;(s), electrostatic attractions ("ionic bonds") between the oppositely charged ions hold these ions in rigid ionic lattices. These ions are unable to move relative to each other. As a result, they cannot flow through the solid to conduct electricity. Under solid state, NaCl is unable to satisfy the second condition.

As a side note, melting NaCl into a liquid breaks the ionic bonds and free the ions from the lattice. Liquid NaCl is a conductor of electricity.

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The sodium salt, NaA, of a weak acid is dissolved in water; no other substance is added. Which of these statements (to a close a
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Your question is somewhat poorly worded, even so what I can contribute is the statement is false, since the salt is sodium chloride, where its severe chemical formula NaCl, is a SALT not an acid and if it dissolves in water, seriously the solute of a solution, where water plays the role of the solvent

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Sodium chloride is a binary salt, very easy to dissolve in water, it is also called the famous table salt, since it can be ingested in food even though it is not so recommended against high blood pressure conditions.

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