Which list has organisms made of different kinds of cells?

Chemistry

1 answer:

Ad libitum [116K]2 years ago

8 0

Answer:

<h2>I think 'A' part</h2>

.............

<h2>.bee, dog, cat,‍ Human</h2><h2>I hope it will help you </h2><h2 />

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Does pyridine undergo nucleophilic aromatic substitution reactions? If no, why not. If yes, on what position does the substituti

sergij07 [2.7K]

Explanation:

Part a

Pyridine is an aromatic heterocyclic compound and undergoes nucleophilic aromatic substitution reaction at 2 and 4 positions.

This is because, when a nucleophile attack pyridine at 2 and 4 positions, the anoin formed is stabilized. In the anion formed is tabilized by resonance and also negative charge is present at electronegative atom, nitrogen.

If the nucleophile attack at 3 position, the anion formed is not as stable as anions formed when nucleophile attach at 2 and 4 positions. This is because negative charge is not present at the nitrogen atom.

Part b:

Tautomers are structural isomers of each others formed by migration atom within the molecule. Tautomers exist in equilibrium with each other.

Tautomers of 2-Hydroxypyridine and 4-Hydroxypyrine are given in the attachment.

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3 years ago

The process that occurs when physical forces break rock into smaller pieces without changing the rock's chemical composition is

sp2606 [1]

Answer:

A) Mechanical Weathering

Pls Mark As Brainliest!!!!!!!!!!!!!

Explanation:

Mechanical weathering breaks rocks into smaller pieces without changing their composition. Ice wedging and abrasion are two important processes of mechanical weathering. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface

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2 years ago

The correct way of making a soluiton of acid in water is to

Talja [164]

Explanation:

To add acid into water to dilute the solution but don't add water into acid it can explosive/ can burnt to the victim

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3 years ago

Question 5 (1 point)<br> Potassium Bromide is insoluble.<br> O True<br> O False

Delicious77 [7]

Is soluble in water but not soluble in acetonitrile.

So i think its false

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