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Sav [38]
3 years ago
13

Describe how the r group in each of the 20 differebt amino acids determines each amino acid's characteristics

Chemistry
1 answer:
mamaluj [8]3 years ago
7 0

The polarity and acid/base character of each R group is the main factor determining the characteristics of an amino acid.

There are four types of R groups:

• <em>nonpolar</em>, e.g., CH₃ in alanine

• <em>polar</em>, e.g., CH₂OH in serine

• <em>acidic</em>. e.g., CH₂COOH in aspartic acid

• <em>basic</em>, e.g., CH₂(CH₂)₃NH₂ in lysine

The R group determines whether an amino acid is acidic, basic, or neutral.

However, the nature of the R groups is the major factor that determines <em>the 2° and 3° structures</em> of polypeptides and proteins.

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If a gas occupies 4600 mL at 0.9 atm and 195°C, what is the new volume in ml
Bumek [7]

Answer:

The new volume is 2415 mL

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases.

Boyle's law says that the volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure and is expressed mathematically as:

P * V = k

Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

\frac{V}{T} =k

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature is decreased, the gas pressure decreases. This can be expressed mathematically in the following way:

\frac{P}{T} =k

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

\frac{P*V}{T} =k

Having two different states, an initial state and an final state, it is true:

\frac{P1*V1}{T1} =\frac{P2*V2}{T2}

In this case:

  • P1= 0.9 atm
  • V1=4,600 mL= 4.6 L (being 1 L=1,000 mL)
  • T1= 195 °C= 468 °K (being 0°C=273°K)

The final state 2 is in STP conditions:

  • P2= 1 atm
  • V2= ?
  • T2= 0°C= 273 °K

Replacing:

\frac{0.9 atm*4.6L}{468K} =\frac{1 atm*V2}{273K}

Solving:

V2=\frac{0.9 atm*4.6L}{468K}*\frac{273K}{1 atm}

V2= 2.415 L =2,415 mL

<u><em>The new volume is 2415 mL</em></u>

6 0
3 years ago
The number of atoms in 2.0 moles of NaOH is _____ of 1.0 mole of H2O.
Irina-Kira [14]

Answer:

The answer is the same as .

Explanation:

There are 3 atoms in NaOH, 1 sodium, 1 oxygen and 1 hydrogen.

There are 3 atoms in H2O, 2 hydrogen and 1 oxygen.

3 0
3 years ago
Which of the following chemical formulas shows a covalent compound? A.CO2 B.MgO C. NaCl D.HBr
gogolik [260]
A...because both of them(carbon and oxygen)are nonmetal
5 0
4 years ago
Read 2 more answers
Is the following equation balanced? Zn + 2HCl → ZnCl₂ + H₂
lutik1710 [3]

Answer:

Yes it's balanced

Explanation:

on the left side, it contains

1 zn and 2 hydrogen and 2 chlorine

while on the right side it contains

1 zn 2 chlorine and 2 hydrogen

7 0
3 years ago
What happens during ice wedging
jek_recluse [69]
Frost wedging happens when water gets in crack, freezes, and expands. This process breaks rocks apart. When this process is repeated, cracks in rocks get bigger and bigger and may fracture, or break, the rock.

Hope this helps :)
7 0
3 years ago
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