QQuestionChemistry
QuestionChemistry
"Determine the electron geometry (eg), molecular geometry (mg), and polarity of SO^3 .
A) eg = trigonal pyramidal, mg = bent, nonpolar
B) eg = tetrahedral, mg = tetrahedral, nonpolar
C) eg = trigonal bipyramidal, mg = trigonal pyramidal, nonpolar
D) eg = tetrahedral, mg = trigonal pyramidal, polar
E) eg = trigonal planar, mg = trigonal planar, nonpolar"
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Answer
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Step 1: Determine the electron geometry (eg) of SO^3.
The molecule SO^3 has 3 regions of electron density around the central S atom (3 double bonds between S and O). According to the valence shell electron pair repulsion (VSEPR) theory, the shape of a molecule is determined by the repulsion of electron pairs in the valence shell of the central atom. For SO^3, the electron geometry is trigonal planar because there are 3 regions of electron density arranged in a plane with 120 -degree angles between them.
Step 2: Determine the molecular geometry (mg) of SO^3.
The molecular geometry of a molecule is the arrangement of its atoms in three-dimensional space. For SO^3, there are 3 O atoms and 1 S atom. Since there are no lone pairs of electrons on the central S atom, the molecular geometry is the same as the electron geometry, which is trigonal planar.
Final Answer
Therefore, the correct answer is E) eg = trigonal planar, mg = trigonal planar, nonpolar.
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