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zysi [14]
2 years ago
12

In recent decades rainforests throughout the world have been cut down for various reasons. In some cases the wood has been used;

in others, the land. The deforestation of Earth's rainforests has resulted in A) the rapid extinction of many species on Earth. B) primary succession and evolution of new habitats. C) habitat destruction and the overall decrease in biodiversity. D) secondary succession and the development of new, successful ecosystems.
Chemistry
2 answers:
zloy xaker [14]2 years ago
7 0
C) one is the correct option
VikaD [51]2 years ago
7 0
<h2>Answer:</h2>

Correct option is C.

C) habitat destruction and the overall decrease in biodiversity.

<h2>Explanation:</h2>

Forests are very important and beneficial for human beings as well as other organisms. Deforestation can affect the environment in many ways. It can change the overall atmosphere of the earth. It can destroy the habitat of many species and can decrease the biodiversity.

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How many grams are in 3 mol of KBr?
e-lub [12.9K]

Answer: 7

Explanation:

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3 years ago
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The density of helium in a 2.00 L tank at 1.0 atm and 23 degrees Celsius is?
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The output density is given as kg/m 3, lb/ft 3, lb/gal(US liq) and sl/ft 3. Specific weight is given as N/m 3 and lb f / ft 3.

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2 years ago
What is the wavelength of a photon with an energy of 3.38 x 10-19 J?
irina1246 [14]

Answer:

C. 588 nm

Explanation:

Given parameters:

Energy of the photon  = 3.38 x 10⁻¹⁹J

Unknown:

Wavelength of the photon   = ?

Solution:

The energy of a photon can be expressed as;

     E = \frac{hc}{wavelength}

    hc  = E x wavelength

     Wavelength  = \frac{hc }{E}  

  h is the Planck's constant = 6.63 x 10⁻³⁴m²kg/s

  c is the speed of light  = 3 x 10⁸m/s

  E is the energy  

   Wavelength = \frac{6.63 x 10^{-34} x 3 x 10^{8} }{3.38 x 10^{-19} }    = 5.89 x 10⁻⁷m

4 0
3 years ago
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Extend the aufbau sequence through an element that has not yet been identified, but whose atoms would completely fill 7p orbital
Thepotemich [5.8K]

Answer:

<u>Number of electrons</u> = 118

<u>Electronic configuration</u>: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶

Explanation:

Given: A chemical element that has completely filled 7p orbital.

According to this, the principal occupied electron shell or the <u>valence shell of such an element is 7p.</u>

⇒ the principal quantum number <u>(n) for the valence shell is 7.</u>

∴ this element belongs to the period 7 of the periodic table.

Also, an element that has completely filled p-orbital belongs to the group 18 of the p-block.

Therefore, an element that belongs to the group 7 and period 18 of the periodic table, should have a <u>completely filled 5f, 6d, 7s and 7p orbitals</u>.

Therefore, the electronic configuration should be: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶

And, the <u>number of electrons</u> = atomic number of radon (Rn) + 14 + 10 + 2 + 6 = 86 + 32 = <u>118</u>.

<u>Therefore, the given element has atomic number 118 and has the electronic configuration: [Rn] 5f¹⁴ 6d¹⁰ 7s² 7p⁶. Thus the given element can be Oganesson.</u>

7 0
3 years ago
As water evaporates from a solution, minerals become more concentrated and begin to form a rock. what type of rock is it.
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B. chemical sedimentary is your answer.
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