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Wewaii [24]
2 years ago
13

Describe the difference between a chemical reaction and a physical change.

Chemistry
1 answer:
GREYUIT [131]2 years ago
5 0
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.


Examples of chemical changes are burning, cooking, rusting, and rotting.

Examples of physical changes are boiling, melting, freezing, and shredding.
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romanna [79]
4Al+6Fe(NO3)2= 6Fe+4Al(NO3)3
4 0
2 years ago
A green rat snake that lives in the grass and a brown rat snake that lives in the desert is a form of what ?
liberstina [14]

A green rat snake that lives in the grass and a brown rat snake that lives in the desert is a form of geographically separated species.

Explanation:

The habitats of the green rat snake  and brown rat snake shows that they are geographically separated species.

The two rat snakes are different species because of their distinct habitat and morphology.

When two species get separated by habitat their breeding method changes either by morphology or breeding pattern.

Such species do not produce viable offspring.

Thus a green rat snake and a brown rat snake have very different habitats they are now two different species.

Such species are said to be reproductively isolated species. Two species having genetic divergence undergo natural selection to adapt to the environment.

6 0
3 years ago
An enzyme is a catalyst used by living things to promote and regulate chemical reactions. What is the most likely enzyme for the
dem82 [27]
I’m going to guess but B?
5 0
3 years ago
Help plz I rly. Need it
babymother [125]

Answer:

It should be D.

Explanation:

3 0
3 years ago
The solubility of copper chloride at 20 °C is 73 g/100 g of water. Kiera adds 100 g of copper chloride to 100 g of water and sti
OLEGan [10]

Answer:

m_{undissolved}=27g

Explanation:

Hello there!

In this case, according to the given information of the solubility of copper chloride, as the maximum amount of this salt one can dissolve without having a precipitate, we infer that since just 73 grams are actually dissolved, the following amount will remain solid as a precipitate:

m_{undissolved}=100g-73g\\\\m_{undissolved}=27g

Best regards!

3 0
2 years ago
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