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Nastasia [14]
3 years ago
13

The last time the atmospheric carbon dioxide level was as high as it is today was _________ years ago.

Chemistry
1 answer:
Nastasia [14]3 years ago
8 0

Answer:The last time levels of atmospheric carbon dioxide were this high came during the Pliocene Epoch, which extended from about 5.3 million to 2.6 million years ago

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Alla [95]

Answer:

1.A

2.A

3.C

4.C

5.B

6.A

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3 years ago
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WILL GIVE BRAINLIEST NO FAKE ANSWERS PLEASE!
AleksAgata [21]

Answer:

A) (3.2g)

Explanation:

Did you reposed this? Because I remember answering this

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2 years ago
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Arun and Marcus are asked to compare the solubility of two salts in water at room temperature. The two salts are labelled X and
oksian1 [2.3K]

Answer:

1) Salts X and Y

2) The solubility of the salts

3) a) The solvent

b) The solvent temperature

Explanation:

1) The independent variable is the variable that is suspected to be the cause of the subject of the investigation

The given investigation is meant to investigate the solubility of different salts

Therefore, the solubility is expected to be dependent on the type of salt, and the independent variable is the type of salt, X or Y

2) The dependent variable is the effect meant to be observed in the investigation, which is the solubility of the salt in water at room temperature

3) The control variables are the variables which are held constant during the investigation, including;

a) The solvent used if the investigation; water

b) The temperature of the solvent; Room temperature

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3 years ago
Why is there a change in energy during chemical reactions?(1 point)
Firdavs [7]

Energy is released by the formation of chemical bonds, and energy is

absorbed when the bonds are broken.

<h3>What is a chemical reaction?</h3>

A chemical reaction involves the formation of new compounds from

reactants . It involves the formation and breaking of bonds in the

elements.

Energy is released by the formation of chemical bonds and this type of

reaction is referred to as exothermic while energy is absorbed when the

bonds are broken and is referred to as an endothermic reaction.

Read more about Chemical reaction here brainly.com/question/16416932

8 0
2 years ago
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Please answer for me thanks...
tatuchka [14]

Explanation:

Since mole ratio of O2 : NH3 = 7 : 4,

Volume of NH3 = 50dm³ * 4/7 = 28.57dm³.

5 0
3 years ago
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