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S_A_V [24]
3 years ago
6

Why are the carboxylic acid groups of the amino acids so much more acidic (pka~ 2) than a carboxylic acid such as acetic acid (p

ka=4.76)?
Chemistry
1 answer:
qwelly [4]3 years ago
6 0
<span>The groups you mention are withdrawing electrons with inductive effect. Because there is no conjugation between the acids (pk-2 and pka 4.76), nitrogen makes it impossible to bind to the carboxyl group. Acids are affected in two ways, the first since the electron subtraction of charged oxygen molecules, and the second way by polarizing the O-H bond with carboxylic acid, this helps the protons to split easily.</span>
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Which phrase describes a scientific theory?
torisob [31]

Answer:

C

Explanation:

Answer: C. A thoroughly tested and widely accepted explanation. Explanation: A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted.

3 0
3 years ago
A gas has a volume of 5.00 L at 20.0oC. If the gas is compressed to 4.0 L, what is the new temperature of the gas in Kelvin?
Tatiana [17]

Answer: 234.4K

Explanation:

Given that,

Original volume of gas (V1) = 5.00 L

Original temperature of gas (T1) = 20.0°C

[Convert 20.0°C to Kelvin by adding 273

20.0°C + 273 = 293K]

New volume of gas (V2) = 4.0L

New temperature of gas (T2) = ?

Since volume and temperature are given while pressure is held constant, apply the formula for Charle's law

V1/T1 = V2/T2

5.00L/293K = 4.0L/T2

To get the value of T2, cross multiply

5.00L x T2 = 293K x 4.0L

5.00L•T2 = 1172L•K

Divide both sides by 5.00L

5.00L•T2/5.00L = 1172L•K/5.00L

T2 = 234.4K

Thus, the new temperature of the gas is 234.4 Kelvin

8 0
3 years ago
I need 2 examples of chemical and physical change. *15 points
melamori03 [73]
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3 0
3 years ago
Match each term to its description.
stepladder [879]

Based on ecological studies, the definitions below applies to the given terms:

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  • Climax community: this is a point in an ecosystem when all populations reach a point of little or no change
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<h3>What is ecology and what are some terms in ecology?</h3>

Ecology is the study of living things and their interactions with their environment.

Some terms in ecology include:

  • Peak phenomena: this is when a population grows at a fast rate, then quickly drops when the resources run out
  • Biological surplus: this occurs when there are more organisms in a population than the ecosystem can sustain
  • Climax community: this is a point in an ecosystem when all populations reach a point of little or no change
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Learn more about Peak phenomena, Biological surplus, Climax community and Sigmoid phenomena at: brainly.com/question/7149100

8 0
3 years ago
Which of the following radioactive emissions is the least penetrating?
3241004551 [841]

Answer:

alpha particles

Explanation:

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sana po makatulong

#keeponlearning

#Godbless

4 0
2 years ago
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