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NISA [10]
1 year ago
7

How many hydrogen bonds will be found within an alpha helix that is 18 amino acids long?.

Chemistry
1 answer:
LekaFEV [45]1 year ago
5 0

An alpha helix which is 18 amino acids long will have 12 hydrogen bonds.

<h3>What is alpha helix (α-helix) ?</h3>

The alpha helix (α-helix) is a common in the secondary structure of proteins and is a right hand-helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O. group of the amino acid located four residues earlier along the protein sequence.

The alpha helix is stabilized by hydrogen bonds (shown as dashed lines) from the carbonyl oxygen of one amino acid to the amino group of a second amino acid.

Because the amino acids connected by each hydrogen bond are four apart in the primary sequence, these main chain hydrogen bonds are called "n to n+4.

Learn more about protein structure here ;

brainly.com/question/14652022

#SPJ1

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At STP, the temperature is __ degrees Celcius and __ K. Question 2 options:
aliina [53]
At STP the standard temperature is 273.15 K.

At STP the standard temperature is 0*C
7 0
3 years ago
How does a scientific theory compare to a scientific law?​
Alisiya [41]

Answer:

Explanation:

Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.

4 0
3 years ago
Need help fast 20 PIONTS
Andrei [34K]

Answer:

N₂(g) + 2O₂(g) → 2NO₂(g).

Explanation;

Photo-chemical smog is considered to be a new type of air pollution that is basically a mixture of pollutants that are formed when volatile compounds of organic nature (Hydrocarbons) react and Nitrogen oxides  (NOx) react with solar radiations of sun and lead to the formation of photochemical smog that looks like a brown haze in the skies of cities.

pounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.

As mentioned in the question, the formation of smog involves a series of reactions:

N2(g) + O2(g)—>2NO(g)

2NO(g) + O2(g)—>2NO2(g)

NON(g) light_» NO(g) + O(g)

O2(g)+O(g)—>Os(9)

NO(g) + O2(g)—>NO2(g) + O2(g)

If we combine all these chemical equations, it gives an answer as:

N₂(g) + 2O₂(g) → 2NO₂(g).

This is because main components involve in the formation of smog is initial N2 and 2 molecules of O2.

Hope it helps!

5 0
2 years ago
Suppose of iron(II) chloride is dissolved in of a aqueous solution of silver nitrate. Calculate the final molarity of chloride a
vodomira [7]

Explanation:

Let us assume that 5.49 g of Iron chloride is dissolved in 350 ml of 66.0 mM aqueous solution of silver nitrate

Hence, the balanced chemical equation for this reaction is as follows.

      FeCl_{2} + 2AgNO_{3} \rightarrow Fe(NO_{3})_{2} + 2AgCl(s)

So, moles of Iron chloride = 5.49 g of molar mass of Iron chloride

              No. of moles = \frac{mass}{\text{molar mass}}

                                    = \frac{5.49 g}{162.2 g/mol}

                                     = 0.0338 moles FeCl_{2}

And, moles of silver nitrate = molarity × volume in L

                                    = 66.0 Mm

or,                                = 0.066 M × 350 ml

                                    = 0.0231 moles AgNO_{3}

Therefore, here silver nitrate is the limiting agent .

Now, we will calculate the moles of Cl^{-} which are reacted as follows:.

          0.0231 moles AgNO_{3} \times \frac{1 moles FeCl_{2}}{2 moles AgNO_{2}}

                             = 0.01155 moles FeCl_{2}

Remaining moles of FeCl_{2} = 0.0338 moles FeCl_{2} - 0.01155 moles FeCl_{2}

                        = 0.02225 mole FeCl_{2}

Or, 0.0445 moles Cl^{-} ions.

Now, we will calculate the molarity as follows.

                  Molarity = \frac{\text{number of moles}}{\text{volume in L&#10;}}

                             = \frac{0.0445 moles Cl^{-}}{0.350 L&#10;}

                             = 0.127 M

Thus, we can conclude that final molarity of chloride anion in the solution is 0.127 M.                              

4 0
2 years ago
NEED HELP ON 15,and 16. PLEASE. Only if you are positive.
Alborosie

Answer:

15. A

16. B

I hope it helps you

Follow me

5 0
2 years ago
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