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Fofino [41]
3 years ago
13

Which intermolecular force is primarily responsible for base pairing, and stability, of the double helix in dna? dipole-dipole h

ydrogen bonds covalent bonds ion-ion london dispersion forces?
Chemistry
2 answers:
ladessa [460]3 years ago
5 0

Hydrogen bonds

Guanine-cytosine and adenine-thymine <em>hydrogen bonds</em> hold the strands of a DNA helix together.

Brut [27]3 years ago
3 0

Answer:

Hydrogen bonds

Explanation:

Hydrogen bonds are the intermolecular forces responsible for base pairing and double helix stability in DNA.

The hydrogen bonds that bind the two strands of DNA are “weak” covalent bonds, meaning they easily denature, which means that they separate and reconnect very easily.

Regarding the nitrogenous bases of DNA, Adenine is paired with Thymine, forming the A-T base pair, and there is double hydrogen bonding between these bases. In the same way that guanine binds to cytosine and forms the base pair G-C by triple hydrogen bonding. And the two chains link through weak hydrogen bridges between the nitrogenous bases of nucleotides, responsible for maintaining the double helix structure of DNA.

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a fraction collected during distillation ethanol-water what is the mass of ethanol that is present in this fraction
AURORKA [14]

Answer:

80 kg

Explanation:

because the liquid with high boiling point is going to be collected the first

4 0
1 year ago
What is the molarity of a solution in which 7.1 g of sodium sulfate is dissolved in enough water to make 100. mL of solution?
Sidana [21]

Answer:

0.50 M

Explanation:

Given data

  • Mass of sodium sulfate (solute): 7.1 g
  • Volume of solution: 100 mL

Step 1: Calculate the moles of the solute

The molar mass of sodium sulfate is 142.04 g/mol. The moles corresponding to 7.1 grams of sodium sulfate are:

7.1g \times \frac{1mol}{142.02g} = 0.050mol

Step 2: Convert the volume of solution to liters

We will use the relation 1 L = 1000 mL.

100mL \times \frac{1L}{1000mL} =0.100L

Step 3: Calculate the molarity of the solution

M = \frac{moles\ of\ solute }{liters\ of\ solution} = \frac{0.050mol}{0.100L} =0.50 M

3 0
3 years ago
Read 2 more answers
What is the width of this penny?
sergey [27]

Answer:

D. 1.2 cm

Explanation:

1st, determine the units. We see that our ruler is in cm.

This rules out A and C.

2nd, determine answer.

We see that the penny extends past 1 and ends at 0.2.

So, the total is 1.2 cm.

3 0
3 years ago
Name the following cycloalkane:
KonstantinChe [14]

B is the correct answer

8 0
3 years ago
a solution was made by mixing sodium chloride () and water (). given that the mole fraction of water is 0.980 in the solution ob
Mnenie [13.5K]

The mass of sodium chloride used <u>was 1.17 grams</u><u>.</u>

The mole fraction can be calculated by way of dividing the number of moles of 1 factor of an answer via the full variety of moles of all the additives of an answer. it is mentioned that the sum of the mole fraction of all the components inside the solution has to be the same as one.

mass  of NaCl given =  64.9 g

mole  = mass/molar mass

          = 64.9 / 58.5

          =<u> 1.109</u>

a mole fraction of water =  0.980

mole fraction of NaCl = 1 - 0.980

                                   = <u>0.02</u>

1 mole of NaCl =  58.5

mass of NaCl  = 58.5 × 0.02

                       =<u> 1.17 gram</u>

Mole Fraction describes the range of molecules contained within one aspect divided through the whole range of molecules in a given combination. it's miles quite beneficial whilst two reactive-natured components are mixed collectively.

Learn more about mole fraction here:-brainly.com/question/29111190

#SPJ4

4 0
1 year ago
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