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natita [175]
2 years ago
5

Which type of weathering is caused by plants?

Chemistry
2 answers:
alexdok [17]2 years ago
7 0

Answer:

c.

Explanation:

Soloha48 [4]2 years ago
4 0

Question

Which type of weathering is caused by plants?

Answer:

A: both mechanical and chemical weathering Is the Correct  Answer!

Hope this Helps!!

Plants and animals can be agents of mechanical weathering. The seed of a tree may sprout in soil that has collected in a cracked rock.

-xXxAnimexXx-

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Need help with chemistry question
horrorfan [7]

This is a multiple question and here are all the answers.

Qestion 1.) Which is not a permissible set of quantum numbers? Identify the subshell (if the quantum numbers identify a possible state).

I. n = 2, ℓ = 0, mℓ = 0

II. n = 3, ℓ = 2, mℓ = 2

III. n = 2, ℓ = 1, mℓ = –1

IV. n = 3, ℓ = 3, mℓ = 0

V. n = 4, ℓ = 3, mℓ = –3

Answer:

  • The combination that is not permissible is IV. n = 3, ℓ = 3, mℓ = 0.

  • Se below to identify the subshells.

Explanation:

The electrons are identified by a set of four quantum numbers.

The first quantum number, n, is the principal quantum number and it tells the shell. The second quantum number,ℓ , is the azymuthal quantum number and it tells the subshell.

The letters used to indicate the subshells are:

  s:  ℓ  = 0

  p:  ℓ  = 1

  d:  ℓ  = 2

  f:  ℓ  = 3

The third and fourth quantum numbers are mℓ (magnetic quantum number) and s (spin).

The rules that apply to predict which quantum numbers are possible are:

  • n: 1, 2, 3, 4, 5, 6, 7 (an integer greater than 0)

  • ℓ: 0, 1, 2, 3, ..., n-1 (an integer less than n)

  • mℓ: an integer from - ℓ to + ℓ

  • s: - 1/2 or +1/2

Two electrons in an atom cannot have the same set of 4 quantum numbers.

With that:

I. n = 2, ℓ = 0, mℓ = 0

  • This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ  to - ℓ.

  • The combination n = 2 and ℓ = 0 means the subshell is 2p.

   

II. n = 3, ℓ = 2, mℓ = 2

  • This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ  to - ℓ.

  • The combination n = 3 and ℓ = 2 means the subshell is 3d.

III. n = 2, ℓ = 1, mℓ = –1

  • This combination of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ  to - ℓ.

  • The combination n = 2 and ℓ = 1 means the subshell is 2p.

IV. n = 3, ℓ = 3, mℓ = 0

  • This set of three quantum numbers is not permissible, since ℓ = 3 is not less than n = 3.

V. n = 4, ℓ = 3, mℓ = –3

  • This set of three quantum numbers is permissible, since n is a positive integer, ℓ is less than n, and mℓ is in the interval +ℓ  to - ℓ.

  • The combination n = 4 and ℓ = 3 means the subshell is 4f.

Question 2.)What is the difference between the 2pz and the 3pz orbitals? Which quantum numbers in the orbital designation are different? Which will be the same? What does this indicate about the orbitals?

Answer:

The difference between    2p_z    and    3p_z    (note that the letter z is a subscript) is in the first quantum number.

The first quantum number indicates the main energy level and so it is related with the size of the orbital.

So, the 3pz orbital is bigger than the 2pz orbital.

The second quantum number is related to the letter p, so the same letter indicates the same shape of the orbital. Remember the table for the letters used to indicate the subshells are:

  s:  ℓ  = 0

  p:  ℓ  = 1

  d:  ℓ  = 2

  f:  ℓ  = 3

So, the scond quantum number for the two orbitals is ℓ  = 1.

The subscript indicates the space orientation. So, since both orbitals have the same subscript, z, they have the same orientation.

In conclusion, the only difference between those orbitals is the size of the orbitals, but they have the same shape and orientation.

3.)What is the maximum number of electrons that can have n = 3 and ms = + ½ ?

Answer:

  • 9 electrons

Explanation:

Using the rules,  for n = 3

  • ℓ can be 0, 1, or 2;

  • mℓ can be 0 for ℓ = 0,  

  • mℓ can be -1, 0, or -1 for  for ℓ = 1, and

  • mℓ can be -2, -1, 0, +1, or +2 for ℓ = 2,

You can get the possible sets of quantum numbers (with n = 3):

  • (3, 0, 0, +1/2)
  • (3, 0, 0, -1/2)
  • (3, 1, 0, +1/2)
  • (3, 1, 0, -1/2)
  • (3, 1, 1, +1/2)
  • (3, 1, 1, -1/2)
  • (3, 1, -1, +1/2)
  • (3, 1, -1, -1/2)
  • (3, 2, 0, +1/2)
  • (3, 2, 0, -1/2)
  • (3, 2, -2, +1/2)
  • (3, 2, -2, -1/2)
  • (3, 2, -1, +1/2)
  • (3, 2, -1, -1/2)
  • (3, 2, 1, +1/2)
  • (3, 2, 1, -1/2)
  • (3, 2, 2, +1/2)
  • (3, 2, 2, -1/2)

So, those are a total of 18 electrons from which half have n = 3 and ms = +1/2.

Hence, 9 electrons can have n = 3 and ms = +1/2.

5 0
3 years ago
A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later,
den301095 [7]

Answer:

before the substance was a gas it was a liquid.

Explanation:

3 0
2 years ago
grapevine trimming and other aromatics can be wrapped in aluminum foil with a few holes poked in it to?
Juli2301 [7.4K]
I need a little more context but I believe you are correct
7 0
3 years ago
The study of Environmental Science includes which of the following?
stepan [7]

Answer:

Hi, There! the Correct Answer is below!

C.)interactions between humans and living and non-living things in the environment

Explanation:

Environmental scientists study subjects like the understanding of earth processes, evaluating alternative energy systems, pollution control and mitigation, natural resource management, and the effects of global climate change. ... Environmental scientists bring a systems approach to the analysis of environmental problems.

____________________________________________________________

Have a wonderful Day :)

~Darkspirit~

3 0
3 years ago
Read 2 more answers
Are the following combinations allowed? If not, show two ways to correct them:
mafiozo [28]

The following combination of n=3 ; l=1 ; ml=-2 is not allowed. One way to correct this would be by changing the azimuthal quantum number, l and the other way would be to change the magnetic quantum number, m.

<h3>Is the following combination n=3; l=1; ml=-2 allowed or not.? If not, suggest two ways through which it can be corrected.</h3>

The following combination of n=3 ; l=1 ; ml=-2 is not allowed.

There are several rules that need to be followed for assigning electron quantum numbers. They are:

1. Principal quantum number should be 1 ≤ n

2. Azimuthal quantum number, 0 ≤ l ≤ n − 1

3. Magnetic quantum number, -l ≤ ml ≤ l

4. Spin quantum number as either -1/2 or +1/2

For n = 3,

l should be n - 1 or n - 2 or n - 3 = 2, 1, 0 respectively.

If we choose l = 1 then ml should be -1, 0 and +1

Therefore, one way to correct the combination would be to change the magnetic quantum number to -1

If we choose l = 2 then ml would be -2, -1, 0, +1, +2

Thus, another way to correct the combination is to choose the azimuthal quantum number as 2.

Thus, the following combination of n=3; l=1; ml=-2 is not allowed. One way to correct this would be by changing the azimuthal quantum number, l and the other way would be to change the magnetic quantum number, m.

To learn more about quantum numbers refer:

brainly.com/question/5927165

#SPJ4

5 0
1 year ago
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