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Which of the following structures have 1+ formal charge on sulfur atom? Why He_2

ID: 535534 • Letter: W

Question

Which of the following structures have 1+ formal charge on sulfur atom? Why He_2 molecule does not exist? A) Bonding molecular orbital of He_2 is filled with two electrons B) He_2 molecule has less potential energy compared to He atoms c) 2p atomic orbitals of He atoms are partially filled D) Both bonding and antibonding molecular orbitals of He_2 are filled with two electrons each E) He_2 molecules have very strong intermolecular force which of the following compounds have trigonal planar molecular geometry at the central atom? What is the hybridization state of the central oxygen atom in ozone? A) sp B) sp^2 C) sp^3 D) p E) sp^3d Which of the following compound is the most soluble in butane solvent?

Explanation / Answer

1)

The formula of formal charge is:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

in structure A:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

Formal charge = 6 - (6 + (1/2)*2)

Formal charge = 6 - (7)

Formal charge = -1

in structure B:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

Formal charge = 6 - (4 + (1/2)*4)

Formal charge = 6 - (6)

Formal charge = 0

in structure C:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

Formal charge = 6 - (2 + (1/2)*6)

Formal charge = 6 - (5)

Formal charge = +1

in structure D:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

Formal charge = 6 - (4 + (1/2)*4)

Formal charge = 6 - (6)

Formal charge = 0

in structure E:

Formal charge = [# of valence electrons] – [electrons in lone pairs + 1/2 the number of bonding electrons]

Formal charge = 6 - (0 + (1/2)*8)

Formal charge = 6 - (4)

Formal charge = +2

Answer: C

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