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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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1) A mixture of anhydrous sodium carbonate and sodium hydrogencarbonate of mass 10.000 g was heated until it reached a constant
vodomira [7]

The masses of the components are obtained as;

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  • Sodium carbonate =  8.708 g
<h3>What is decomposition?</h3>

The term decomposition has to do with the breakdown of the given substance into its components. The components of sodium hydrogen carbonate could be identified as water vapor, carbon dioxide gas and sodium carbonate. Among these products that have been listed here, we can see that it is only the sodium carbonate that remains as a solid. The others are gases that move away from the system that is under study.

Now putting down the equation of the reaction, we have;

2NaHCO_{3} (s) ----- > Na_{2} CO_{3} (s) + CO_{2} (g) + H_{2} O(g)

Now, the loss in  mass must be due to the carbon dioxide and the water. Hence we obtain the loss in mass to be 10.000 g -  8.708 g = 1.292 g

Mass of sodium hydrogen carbonate = 2 * 88 g/mol * 1.292 g/62 g/mol

= 3.51 g

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Answer:

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What is the name of the molecule below?
Lostsunrise [7]

The name of the molecule above is <u>Ethene</u>

<h3>What are organic compounds?</h3>

Organic compounds can be defined as compounds containing carbon and hydrogen.

Some classes of organic compounds are:

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So therefore, he name of the molecule above is Ethene

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