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dedylja [7]
3 years ago
14

One example of a physical change is

Chemistry
2 answers:
Gekata [30.6K]3 years ago
8 0
Plucking eyebrows hehe
Liono4ka [1.6K]3 years ago
6 0
You choose from any of these examples for physical changes
Crumpling a sheet of aluminum foil
Melting an ice cube
Casting silver in a mold
Breaking a bottle
Boiling water
Evaporating alcohol
Shredding paper
Sublimation of dry ice into carbon dioxide vapor
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Answer:

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6 0
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Draw the alkyl bromide(s) you would use in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate
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The structure of the alkyl bromides used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate are as drawn in the attached image.

<h3>Ethyl 2-methyl-4-pentenoate by Malonic ester synthesis.</h3>

The malonic ester synthesis is a chemical reaction characterized by the alkylation of diethyl malonate or a similar ester of malonic acid at the carbon alpha (directly adjacent) to both carbonyl groups, and subsequently converted to a substituted acetic acid.

Hence, it follows from the structure of Ethyl 2-methyl-4-pentenoate that the alkyl bromides used are Ethyl bromide and methyl bromide.

Read more on Malonic ester synthesis;

brainly.com/question/17237043

6 0
2 years ago
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