Answers26-27 WHS-Chemistry-1stSixWeeksThe History and Arrangement of the Periodic Table

Molecular Geometry Answers

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1
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Which type of hybridization leads to a trigonal planar electron domain geometry?

A
s
B
sp
C
sp2
D
sp3
2
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Which molecule has a trigonal planar shape?

A
carbon monoxide
B
boron trichloride
C
silicon tetraiodide
D
carbon tetrafluoride
3

Which is most likely an example of an angular molecule?

A
NH3
B
H2O
C
SiCl4
D
H2CO
4

Which best compares a molecule that has a trigonal planar shape with one that has a trigonal pyramidal shape?

A
They both contain three lone pairs of electrons around the central atom.
B
They both contain three atoms around the central atom.
C
The central atom of the trigonal planar molecule has two lone pairs around it, but the central atom of the trigonal pyramidal molecule has only one.
D
The central atom of the trigonal planar molecule has two atoms around it, but the central atom of the trigonal pyramidal molecule has only one.
5

What is the molecular shape of HCN?

A
bent
B
linear
C
angular
D
trigonal pyramidal
6

Two molecules have the same molecular geometry but different electron domain geometries. Which combination of atoms and lone pairs around the central atom could describe these molecules?

A
2 atoms and 2 lone pairs; 3 atoms and 0 lone pairs
B
1 atom and 3 lone pairs; 2 atoms and 1 lone pair
C
3 atoms and 1 lone pair; 3 atoms and 0 lone pairs
D
2 atoms and 2 lone pairs; 2 atoms and 1 lone pair
7

A Lewis electron structure of a molecule is shown. Judging by the electron domain geometry, which type of hybrid orbitals does this molecule have?

Question illustration
A
s
B
sp
C
sp2
D
sp3
8

The hybrid orbitals of a molecule are shown in the figure.These hybrid orbitals were most likely formed by mixing

Question illustration
A
one s orbital and one p orbital.
B
one s orbital and two p orbitals.
C
one s orbital and three p orbitals.
D
two s orbitals and two p orbitals.
9

Consider the Lewis dot structures below, which represent the valence electrons of carbon (C) and chlorine (Cl). When these bond to make CCl4, what is the shape of a CCl4 molecule?

Question illustration
A
linear
B
circular
C
tetrahedral
D
trigonal planar
10

A molecule that has a linear shape has two electron domains around the central atom. How many lone pairs of electrons are present around the central atom?

A
zero
B
one
C
two
D
three

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Molecular Geometry Answers — 26-27…