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kirill [66]
3 years ago
8

Which of the following is the correct formula for sulfuric acid?

Chemistry
2 answers:
lidiya [134]3 years ago
8 0

Answer : The correct option is, (D) H_2SO_4

Explanation :

Sulfuric acid is a strong acid which is composed of the elements hydrogen, oxygen and sulfur. Sulfuric acid is a colorless and odorless liquid that is soluble in water and it is highly exothermic.

The formation of sulfuric acid from its ions, is given by the equation:

2H^+(aq)+SO_4^{2-}(aq)\rightarrow H_2SO_4(aq)

The molecular formula of sulfuric acid is, H_2SO_4

Hence, the correct formula for sulfuric acid is, H_2SO_4

kondor19780726 [428]3 years ago
6 0
D. H2SO4 would be correct!

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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
Fill in the blanks for
lara [203]

Answer:

Balanced forces are equal in size and opposite in direction. When forces are balanced, there is no change in motion. In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force. You observed that the object did not move.

Explanation:

hope this helps if not im sorry

7 0
2 years ago
Read 2 more answers
Calcium carbide ( CaC2) reacts with water to produce acetylene (C2H2) as shown in the unbalanced reaction below: CaC2(s)+H2O(g)-
MaRussiya [10]
Answer:
46.3g H2O

Explanation:
start by balancing it: CaC2(s) + 2H2O(g) -> Ca(OH)2(s) + C2H2(g)

then use factor label method to solve

82.4g CaC2 x (1 mol CaC2/64.10g CaC2) x (2 mol H2O/1 mol CaC2) x (18.016g H2O/1 mol H20) = 46.3g H2O
4 0
2 years ago
14. All the following are necessary parts of a neutralization reaction except A. an indicator. B. a salt. C. water. D. an acid.
ValentinkaMS [17]

The correct answer is <em>B. a Salt </em><em>because The reaction of an acid and a base is called a neutralization reaction because the properties of both the acid and base are diminished or neutralized when they react. A neutralization reaction is a reaction of an acid with a base in aqueous solution to produce water and a salt, as shown by the following equation:</em>

<em>acid + base → salt + water</em>

<em />

<em>* Hopefully this helps:) Mark me the brainliest:) </em>

<em>∞ 234483279c20∞</em>

6 0
3 years ago
In order to change grams of a substance to moles of the same substance, or vice versa, the following should be used:
Pani-rosa [81]
You can you ft/ centimeter
6 0
3 years ago
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