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mote1985 [20]
2 years ago
15

Who is credited with creating the first accurate model of DNA

Chemistry
2 answers:
Temka [501]2 years ago
7 0

Answer:James Watson and Francis Crick are credited with creating first accurate model of DNA.

Explanation:

kupik [55]2 years ago
7 0

Answer:

Watson & Crick.

Explanation:

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What has to happen to join two monosaccharide units into a disaccharide?
omeli [17]
A condensation reaction forming a glycosidic bond. so in other words a monosaccharide joining together to form a disaccharide. 

5 0
3 years ago
Calculate the energy of a photon with a frequency of 9.78 x 1021 Hz.
Alex_Xolod [135]

Answer:

9.98538 kilohertz

Explanation:

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8 0
3 years ago
Appropriate units for the speed of a chemical reaction, the reaction rate, are _______.
svetlana [45]
Appropriate units for the speed of a chemical reaction, the reaction rate, are M/s
5 0
2 years ago
Define symbole and valeny.​
Alexxx [7]

Answer:

Chemical symbol

This is used to identify an element without having to write the full name and as such is a designation for the element. It is used in chemical reactions and is usually either one or two letters. Some symbols are, Iron - Fe, Hydrogen - H and Oxygen - O.

Valency

This refers to the capacity of an element to combine with another to form a compound. It is measured by the number of electrons that an atom of an element gains, looses or shares when a chemical reaction involving it takes place.

3 0
3 years ago
The pOH of a solution of KOH is 11.30. What is the [H*] for this solution?​
Sloan [31]

Answer: The concentration of hydrogen ions for this solution is 1.99 \times 10^{-3}.

Explanation:

Given: pOH = 11.30

The relation between pH and pOH is as follows.

pH + pOH = 14

pH + 11.30 = 14

pH = 14 - 11.30

= 2.7

Also, pH is the negative logarithm of concentration of hydrogen ions.

pH = - log [H^{+}]

Substitute the values into above formula as follows.

pH = -log [H^{+}]\\2.7 = -log [H^{+}]\\conc. of H^{+} = 1.99 \times 10^{-3}

Thus, we can conclude that the concentration of hydrogen ions for this solution is 1.99 \times 10^{-3}.

4 0
3 years ago
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