Question

Consider the following statements and determine which are true and which are false. SeF4 is a...


Consider the following statements and determine which are true and which are false.


SeF4 is a polar molecule.
NO3- has only two resonance Lewis structures.
Bond angles for IF6+ are 60 °.
The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:
(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in the molecule)
SeF4 has a square planar structure.
Silane (SiH4) is a non-polar molecule.

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Answer #1

i.SeF4 is a polar molecule   = TRUE (due to having see-saw shape)
ii. NO3- has only two resonance Lewis structures = FALSE (it has three resonance structures)
iii. Bond angles for IF6+ are 60 ° = TRUE
iv. The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:
(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in the molecule) = TRUE
v. SeF4 has a square planar structure = FALSE (see-saw shape)
vi. Silane (SiH4) is a non-polar molecule = TRUE

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