Scientists have: (Select all that apply.)

2 answers:

3 0

Scientists have: (Select all that apply.)
a. observed amino acids forming spontaneously
b. demonstrated how amino acids can form from the environment
c. confirmed that the ultimate source of amino acids and proteins is from plants
d. not yet determined the source of amino acids

The correct answers are:

Demonstrated how amino acids can form from the environment
Confirmed that the ultimate source of amino acids and proteins is from plants

iren [92.7K]4 years ago

3 0

Demonstrated how amino acids can form from the environment and confirmed that the ultimate source of amino acids and proteins is from plants. Hope that was helpful!

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Into what genre does a novel fit that

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A. non fiction or a ajami to download

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Which substance could any excess not be removed by filtration

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Answer:

sodium hydroxide

Explanation:

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How many unpaired electrons are present in the ground state of the atoms in group 6a(16)?

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Lets take one element from Group 6A, Let it be oxygen, The electronic configuration of Oxygen is as follow,

O = 8 = 1s², 2s², 2px², 2py¹, 2px¹

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3 years ago

A glass laboratory flask is filled with gas at 24 ∘C and 0.95 atm pressure, sealed, and then heated to 104 ∘C. What is the press

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The pressure inside the flask on heating it is given as 1.21 atm.

Explanation:

As per Guy Lussac's law, the pressure of any concealed volume of gas particles will be directly proportional to the temperature of the container of the gas particles.

So P ∝ T

To convert celsius to kelvin, add 273.15 to the temperature value in celsius

Since, here the initial temperature of the flask is given as 24°C, so in kelvin it will be 297.15 K. Similarly, the final temperature is said to be 104°C which will be equal to 377.15 K. Then the final pressure will be increased as there is increase in temperature. So, the final pressure inside the flask can be obtained as

$\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }$

$P_{2} = \frac{P_{1} }{T_{1} } \times T_{2} =\frac{0.95}{297.15} \times 377.15 =1.21\ atm$

So, the pressure inside the flask on heating it is given as 1.21 atm.

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4 years ago

How many moles of O2 are produced in the decomposition of 24 g of water in the

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M of water = 2(1) + 16 = 18 g/mol
n of water = 24g/(18g/mol) = 4/3 mol
n of H2O : n of O2 = 2 : 1
2:1 = 4/3 : x
x = (4/3)/2 = 2/3 mol of O2

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3 years ago