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Andreas93 [3]
2 years ago
14

Which of the following physical changes is not an example of a change in state?

Chemistry
1 answer:
Nat2105 [25]2 years ago
3 0

Answer:

Option

Explanation:

Rock is broken into piece but thestate is normal

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Answer:

Explanation:

The movement of the electrons is illustrated in the picture attached to this answer. It is a four-step reaction mechanism.

First STEP: The first step involves the transfer of an electron from sodium to form a radical anion.

Second STEP: This radical anion then removes a proton/hydrogen from ammonia in a bid to neutralize itself (hence the hydrogen becomes bonded to the anion).

Third STEP: The sodium (from NaNH₂ formed) transfers an electron again to produce a vinyl carbanion.

Fourth STEP: The carbanion then removes a proton/hydrogen from ammonia (like in the second step) to form a neutral trans-alkene.

NOTE: The circled numbers denote each step while the mechanism on the left represents the use of any alkyl group (R and R') while the mechanism on the right assumes both alkyl groups are methyl. Hence, 2-butyne started the reaction and the final product was trans-2-butene.

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Dr. Patel and her team have been using GPS to track two plates that are moving toward each
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C: One plate is going underneath the other plate and sinking into the soft rock below.

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Plates have different motion. At some places, they move apart and they are said to be divergent.

When plates moves towards each other, they are convergent. At a convergent margin, a plate collides with another thereby causing the denser plate usually the oceanic plate to subduct into the asthenosphere. In some other cases, the plates can collide and build upward.

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Lithosphere brainly.com/question/9582362

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How are the noble gases stable and do they exist separatly with no other element
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Yes they are stable because they follow octet rule but am not sure if they are exist separetly
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