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Georgia [21]
3 years ago
11

Phase changes are chemical changes. True False ...?

Chemistry
2 answers:
tekilochka [14]3 years ago
8 0
False
Phase changes are physical changes and can be easily reverted by adjusting pressure or temperature. 
marusya05 [52]3 years ago
5 0
Hi , the answer is false.
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When discussing discordant and harmonious sound waves, which statement is false?
notka56 [123]
When discussing discordant and harmonious sound waves, the statement tat is false is : if the original waves combine to form irregular displacement of air, the sound will be discordant. The fact is, irregular displacement of air does not guarantee sound discordance

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3 0
3 years ago
How many chiral centers does clavulanic acid have?
VikaD [51]

Answer:

Clavulanic acid has two (2) chiral centers.

Explanation:

A chiral center is a center (usually carbon) with four different substituents.

The structure of clavulanic acid is shown in the attachment below.

Consider the labeled diagram in the attachment,

Carbon A is not a chiral carbon because it has two hydrogen atoms attached to it

Carbon B is not a chiral carbon because it has only three substituents

Carbon C is a chiral carbon because it has four different substituents

Carbon D is a chiral carbon because it has four different substituents

Carbon E is not a chiral carbon because it has only three atoms directly attached to it

Carbon F is not a chiral carbon because it has only three atoms directly attached to it

Carbon G is not a chiral carbon because it has two hydrogen atoms attached to it

Carbon H is not a chiral carbon because it has only three substituents

Then, only carbons C and D are chiral carbons.

Hence, clavulanic acid have two (2) chiral centers.

7 0
3 years ago
WILL GIVE 50 POINTS AND BRAINLIEST Describe the properties of alkaline earth metals. Based on their electronic arrangement, expl
Arisa [49]
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Owing to their high reactivity, they are seldom found free in nature. They always occur in combined state with other highly reactive nonmetals.
7 0
2 years ago
Which statement best describes what happens during a chemical change?
shutvik [7]
I think the best answer that will describe chemical change is the first option. During a chemical change, b<span>oth the identity and the properties of a substance change because new substances are being formed by a chemical reaction. An example is rusting of steel</span>
4 0
3 years ago
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</span>He should include THREE significant figures in the density value that hereports.
3 0
3 years ago
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