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aev [14]
3 years ago
7

1. What first prompted James Watson's desire to solve the structure of DNA?

Chemistry
1 answer:
GuDViN [60]3 years ago
5 0

<u>Explanation:</u>

1. It was as a result of a blurry picture of the DNA eye made by scientist, Maurice Wilkins, this glimpse of the DNA made James Watson even more curious about the DNA.

2. They were considered an unlikely pair due to their age difference of about 12 years. Seemed unlikely because there was a 12 year age difference. However, they are considered a perfect team to solve the structure since James Watson has a strong background in biology, while Francis Crick is an expert in x-ray crystallography.

3. Other researchers also racing to find the structure include;

  • Rosalind Franklin, and
  • Linus Pauling.

4. It is important to note that the data provided by Rosalind Franklin enabled Watson and Crick to better understand the chains that make up the DNA.

5. In the year, 1962 they were awarded the Nobel prize in Physiology and Medicine. They were only three recipients because at the time they were the only living early contributors to the study of the DNA.

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Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

Explanation:

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ASAP: The main difference between the gravitational force and electrical force is that
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1. Calculate the energy of a photon with a frequency of 3x1015 Hz.<br> ?????
Afina-wow [57]

Answer:

1.99 x 10⁻¹⁸J

Explanation:

Given parameters:

Frequency of the wave  = 3 x 10¹⁵Hz

Unknown:

Energy of the photon  = ?

Solution:

To solve this problem, we use the expression below;

     E  = hf

Where E is the energy, h is the Planck's constant and f is the frequency

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6 0
3 years ago
A sample of gas occupies a volume of 61.5 mL . As it expands, it does 130.1 J of work on its surroundings at a constant pressure
Lesechka [4]

Answer:

the final volume of the gas is V_2 = 1311.5 mL

Explanation:

Given that:

a sample gas has an initial volume of 61.5 mL

The workdone = 130.1 J

Pressure = 783 torr

The objective is to determine the final volume of the gas.

Since the process does 130.1 J of work on its surroundings at a constant pressure of 783 Torr. Then, the pressure is external.

Converting the external pressure to atm ; we have

External Pressure P_{ext}:

P_{ext} = 783 \ torr \times \dfrac{1 \ atm}{760 \ torr}

P_{ext} = 1.03 \ atm

The workdone W = P_{ext}V

The change in volume ΔV= \dfrac{W}{P_{ext}}

ΔV = \dfrac{130.1 \ J  \times \dfrac{1 \ L  \ atm}{ 101.325 \ J}  }{1.03 \ atm }

ΔV = \dfrac{1.28398717 }{1.03  }

ΔV = 1.25 L

ΔV = 1250 mL

Recall that the initial  volume = 61.5 mL

The change in volume V is \Delta V = V_2 -V_1

-  V_2= -  \Delta V  -V_1

multiply through by (-), we have:

V_2=   \Delta V+V_1

V_2 =  1250 mL + 61.5 mL

V_2 = 1311.5 mL

∴ the final volume of the gas is V_2 = 1311.5 mL

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A saturated solution can become supersaturated under which of the following conditions
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the answer is d. when more solute is added

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