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Molecular Geometry and Polarity

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Match these items

___CH4 a. linear
___PCl3 b. pyramidal
___BeBr2 c.tetrahedral
___H2O d.bent
___BF3 e.planar triangular

Which molecule would most likkely be nonpolar?

a. I--Br
b. Cl
[
B
( )
Cl Cl

c. S--F
(
F

d. P
( triangle )
F F

e. Br--Be--F

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Solution Preview

Match these items

___CH4 a. linear
___PCl3 b. pyramidal
___BeBr2 c.tetrahedral
___H2O d.bent
___BF3 e.planar triangular

To find the shapes of these compounds, you need to first draw Lewis structures of each:

CH4 has four bonds coming out. This is the most common shape and is tetrahedral, C. Tetrahedral is shaped like a tripod with a stand on top.

PCl3 is almost like CH4 except that it has a lone pair replacing one of the bonds. If you imagine the tetrahedral ...

Solution Summary

This solution explains how to find the shape of several compounds. It also explains how to determine the polarity of compounds.

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See Also This Related BrainMass Solution

Molecular Geometry for Carbon Atoms

_____1) Which atom below has 4 valence electrons?
a) Carbon b) Beryllium c) Hydrogen d) Nitrogen e) None

_____2) What is the correct Lewis dot structure for oxygen?
a) b) c) d) e) no right choice

_____3) Which chemical has the most number of valence electrons in its Lewis structure (electron-dot structure)?
a) methane b) hydrogen cyanide c) dihydrogen monoxide d) nitrogen trihydride e) all the same

_____ 4) Which choice below has the correct Lewis structure (electron-dot structure) ?
a) b) c) d) e) all are incorrect

____ 5) What is the molecular geometry of dihydrogen monoxide?
a) linear b) trigonal planar c) bent d) tetrahedral e) no right answer
6) For each of the chemical listed, place a check mark () on all the type of attractive / intermolecular forces that the chemical possesses and determine if the chemical is polar or nonpolar.
Dipole-Dipole LDF H-Bond Circle the correct choice.
methane Nonpolar or polar
Hydrogen cyanide Nonpolar or polar
Dihydrogen monoxide Nonpolar or polar
Nitrogen trihydride Nonpolar or polar

Complete the Lewis Structure for the chemical below, and answer the questions next to the structure.

What is the molecular geometry around the carbon atom?
a) linear b) trigonal c) bent d) tetrahedral e) no right choice

What is the molecular geometry around the oxygen atom?
a) linear b) trigonal c) bent d) tetrahedral e) no right choice

Is the chemical polar or nonpolar?

Name all the intermolecular forces this chemical possesses.

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