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Karo-lina-s [1.5K]
3 years ago
7

Why a finely powdered sample should be used in a melting point measurement?

Chemistry
1 answer:
lapo4ka [179]3 years ago
6 0

because it a essential for good heat transfer

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What does the difference in potential energy between the reactants and products represent? A. It represents the energy required
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B. It represents the change in enthalpy for the reaction.

Explanation:

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6 0
3 years ago
Draw the curved arrow mechanism for the formation of an acetal from acidic methanol and 4-methylpentan-2-one in the fewest steps
morpeh [17]

Answer:

See explanation below

Explanation:

This reaction is known as Ketone hydrolisis in acid medium. This involves the formation of an hemi cetal, and then, the acetal. This is often used to convert ketones or aldehydes in ethers.

The first step involves the reaction with the acid. The carbonile reacts with the acid and forms an alcohol there. The next step is the reaction of the alcohol, in this case, the methanol to form the hemi cetal. Then in the third step, we repeat the first step, using acid to turn the OH group into a great leaving group such water. Then the water leaves the molecule, leaving the space wide open in the next step for methanol, and the acetal is formed.

See picture for the curved arrow mechanism

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Is damp wood and ignition source?
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Also can I plz get brainiest?

7 0
3 years ago
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