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STALIN [3.7K]
3 years ago
7

Helppppppppppppppppppppppppppppppppppppppppppppppppp

Chemistry
2 answers:
Ierofanga [76]3 years ago
7 0

Answer:

the answer is A

Explanation:

Anit [1.1K]3 years ago
6 0

Answer:   it is a

Explanation:

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Which liquid has the highest vapor pressure at 75°C?
Temka [501]

Answer:

1)  Ethanol

Explanation:

If we will have <u>interactions</u> we will need more <u>energy</u> to break them in order to go from liquid to gas. If we need more <u>energy</u>, therefore, the <u>temperature will be higher</u>.

In this case, we can discard the <u>propanone</u> because this molecule don't have the ability to form <u>hydrogen bonds</u>. (Let's remember that to have hydrogen bonds we need to have a hydrogen bond to a <u>heteroatom</u>, O, N, P or S).

Then we have to analyze the hydrogen bonds formed in the other molecules. For ethanol, we will have only <u>1 hydrogen bond</u>. For water and ethanoic acid, we will have <u>2 hydrogen bonds</u>, therefore, we can discard the ethanol.  

For ethanoic acid, we have 2 <u>intramolecular hydrogen bonds</u>. For water we have 2 <u>intermolecular hydrogen bonds</u>, therefore, the strongest interaction will be in the <u>ethanoic acid</u>.

The<u> closer boiling point</u> to the 75ºC is the <u>ethanol</u> (boiling point of 78.8 ºC) therefore these molecules would have <u>enough energy</u> to <u>break</u> the hydrogen bonds and to past from<u> liquid to gas</u>.

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3 years ago
Tracy observes an organism that lives in a lake by her house. The organism has an internal skeleton, scales, fins, and gills. Th
andrey2020 [161]
I'd say B. Its most likely a fish.
8 0
3 years ago
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PLS HELP ASAP <br><br> How does the mass of an object affect its force?
seraphim [82]

Answer:

If mass increases, force increases.

Explanation:

hope this helps, pls mark brainliest :D

5 0
3 years ago
A helium-filled weather balloon has a volume of 512 L at 18.9°C and 756 mmHg. It is released and rises to an altitude of 2.14 km
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633.97 L

Explanation:

Well use the combined gas law;

P₁V₁T₁ = P₂V₂T₂

We need to change the temperatures into Kelvin;

18.9°C= 292.05 K

5.9°C = 279.05 K

756 * 512 * 292.05 = 639 * V₂ * 279.05

113,044,377.6 = 178,312.95 V₂

V₂ = 113,044,377.6 / 178,312.95

V₂ = 633.97 L

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3 years ago
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Answer:

climate

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