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Anna007 [38]
3 years ago
14

1. How many moles of potassium are present in 4.23 x 1025 potassium atoms?

Chemistry
1 answer:
eduard3 years ago
5 0

Answer:

70.26 moles

Explanation:

1 mole of potassium will contain 6.02 x 10²³ atoms of potassium

6.02 x 10²³ atoms of potassium  = 1 mole

4.23 x 10²⁵ atoms of potassium = 4.23 x 10²⁵ / 6.02 x 10²³

= 70.26 moles .

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Answer:

The main difference between the two is euchromatin is genetically active while heterochromatin is genetically inactive

5 0
2 years ago
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Which structure is located between the auricle and the eardrum? O stirrup O ear canal O auditory nerve Ocochlea​
Damm [24]

Answer:

The structure that is located between the auricle and the eardrum is the ear canal.

Explanation:

The ear canal, or external ear canal, is a a tubular hole about 30 mm long that runs from the auricle to the eardrum, forming part of the external ear.

Its function is to conduct sound, in the form of vibrations, from the outside to the eardrum. It also has the function of producing a viscous secretion called cerumen, capable of trapping dust particles and small foreign bodies.

Other options are not correct because:

  • <em>Stirrup is located in the middle ear, along with the anvil and hammer. </em>
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3 0
3 years ago
What is the pH of a solution with a 3.2 x 10−6 M hydronium ion concentration?
Rainbow [258]

Answer:

<h2>5.49</h2>

Explanation:

The pH of a solution can be found by using the formula

pH = - log ([ { H_3O}^{+}])

H3O+ is the hydronium ion

From the question we have

pH =  -  log(3.2 \times  {10}^{ - 6} )  \\  = 5.49485..

We have the final answer as

<h3>5.49 </h3>

Hope this helps you

4 0
3 years ago
How many liters are there in 28g of B?
Juliette [100K]
Hi
The volume is 58.1
The moler mass is 10.8
Molar mass details
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Hope this helps
5 0
3 years ago
Calculate the energy of light having a wavelength of 395 nm. <br> show work
Liono4ka [1.6K]

Answer: 5.032\times 10^{-19}\ J

Explanation:

Given

The wavelength of the light is \lambda =395\ nm

Energy associated with a photon(light) is given by E=\frac{hc}{\lambda}

where, h=\text{Planck constant}

c=\text{speed of light}

\Rightarrow E=\dfrac{6.626\times 10^{-34}\times 3\times 10^8}{395\times 10^{-9}}\\\\\Rightarrow E=5.032\times 10^{-19}\ J

Therefore, the energy associated with the light is 5.032\times 10^{-19}\ J

6 0
3 years ago
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