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sineoko [7]
3 years ago
13

In the protonated form of lysine, the positive charge is localized on one nitrogen atom. In the protonated form of arginine, the

charge is delocalized on 3 nitrogen atoms. Why does this explain why the side chain of arginine has higher pKa than the side chain of lysine?
Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:

pK_a of arginine is higher than that of lysine.

Explanation:

1. According to the Bronsted-Lowry acid-base theory, a stronger base will have a weak conjugate acid.

The positive charge is more stable on sp^3 hybrid atom as compared to sp^2 hybrid atom.

Therefore, arginine is more basic as compared to lysine.

2. Moreover, 3 nitrogen atoms are present in arginine that has the capability to accept acidic protons as compared to the one nitrogen that is present in lysine.

Higher the pK_a, higher will be the basicity.

Therefore, pK_a of arginine is higher than that of lysine.

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Convert 6.71 moles NH3 to number of molecules.
svetlana [45]

Answer: There are 40.41 \times 10^{23} molecules present in 6.71 moles of NH_{3}.

Explanation:

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According to the mole concept, 1 mole of every substance contains 6.022 \times 10^{22} molecules.

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Molecules = moles \times 6.022 \times 10^{23}\\= 6.71 \times 6.022 \times 10^{23}\\= 40.41 \times 10^{23}

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Why does water boil at a lower temperature at higher altitudes
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5 0
2 years ago
I need help wit this can someone pls explain???
Crazy boy [7]

Based on the nature of the sub-atomic particles, the correct answers are:

5. No Charge

6. Negative

7. Neutrons and Protons

8. 35 electrons

9. atomic number is 5

10. atomic mass is 11

11. number of protons is 15

12. number of electrons is 20

13. number of neutrons is 30 (55 -25)

14. mass number is 7

15. number of neutrons is 11 (36 - 25)

<h3>What are the sub-atomic particles?</h3>

The sub-atomic particles are the electrons, protons, and neutrons.

The electron is negatively-charged, the proton is positively-charged, whereas, the neutron is neutral and has no charge.

The number of electrons in a neutral atom is equal to the number of protons.

The sum of protons and neutrons gives the mass number of the atom.

Considering the given questions:

5. What type of charge does a neutron have?

Answer = No Charge

6. What type of charge does an electron have?

Answer =  Negative

7. Which two subatomic particles are located in the nucleus of an

Answer = Neutrons and Protons

8. If an atom has 35 protons in the nucleus, how many electrons will it have orbiting the nucleus?

Answer = 35 electrons

9. What is the atomic number of the atom in the diagram above?

Answer = atomic number is 5

10. What is the atomic mass/mass number of the atom in the diagram above?

Answer = atomic mass is 11

11. How many protons are in the nucleus of an atom with an atomic number of 15?

Answer = number of protons is 15

12. How many electrons are in the nucleus of an atom with an atomic number of 20?

Answer = number of electrons is 20

13. How many neutrons are in the nucleus of an atom with an atomic number of 25?

Answer = number of neutrons is 30 (55 -25)

14. What is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons?

Answer = mass number is 7

15. How many neutrons are in the nucleus of an atom that has an atomic mass of 36 and an atomic number of 25?

Answer = number of neutrons is 11 (36 - 25)

In conclusion, the mass number of an atom is the number of protons and neutrons in the nucleus of the an atom.

Learn more about atomic number and mass number at: brainly.com/question/487717

#SPJ1

7 0
2 years ago
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