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Vedmedyk [2.9K]
3 years ago
10

PLeaseee help me with this.

Chemistry
1 answer:
Ivan3 years ago
8 0

Answer:

I think D because it's the closest description to convection as you can get

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Is NaCH an element ? why or why not?
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I believe you mean NaCI*, (sodium chloride) . Sodium Chloride is not an element, it is known as an ionic compound, reason being because it forms an ionic bond with Na and CI.
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Difference between fission and fusion?
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The difference is the following: Fission is when a heavy nucleus is very unstable and is splitted into two lighter nuclei. Fusion is in a sense the contrary process: two light nuclei combine and release more energy
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A student is participating in the school science fair. She wants to investigate household cleaners.
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The entropy variation (ΔS) is calculated only in the reversible process because, in the irreversible one, it's difficult to determine it. So, ΔS depends on qrev, which is the heat for the reversible process.

There is only one reversible isothermal path between two states, that's why it's easy to calculate ΔS for it.

The value of ΔS doesn't depend on the path, but only on the initial and the final states, so ΔS has only one particular value regardless of the path taken between states.

2) The entropy is the measure of the disorganization of a system, so when the molecules are more distant and vibrating, the entropy is higher (Sgas > Sliquid > Ssolid), and when the temperature increases, the entropy decreases (ΔS = qrev/T), so 1 mol of H₂(g) at 0ºC has the greatest entropy.

3) During a phase change, for a pure substance, the temperature remains constant, until all the substance changes for the other phase. The entropy is the measure of the disorganization of a system, so when the degrees of freedom and motion of the molecules increase, the system becomes more disorganized, so the entropy increases.

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Cho 2.3 gam natri vào 100ml nước . Tính nồng độ dung dịch thu được ( C% )
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Answer:

maybe speak in english than we can understand and help you sorryy

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