Girish Toofany
- Chem121/120 2008-3 Surrey Le
1
Assignment 8.
Due date: Sat Nov 15 23:59:00 2008
3 point(s)
Lewis Diagrams – Formal Charges
How many lone pairs are in the best Lewis structure of
CO
?
You are correct.
Your receipt is 167-5461
What is the total number of valence electrons in the Lewis
structure of
CN
−
?
You are correct.
Your receipt is 167-1246
What is the formal charge on the O atom in the correct or
best Lewis structure for
CO
?
Choices:
+7
,
+6
,
+5
,
+4
,
+3
,
+2
,
+1
,
0
,
-1
,
-2
,
-3
,
-4
,
-5
,
-6
,
-7
.
A.
You are correct.
Your receipt is 167-2871
4 point(s)
Valence Bond Model – Structure and Bonding (4
parts – 3 molecules)
VSEPR
theory
predicts which arrangement of bonds and
lone pairs of electrons about the central S atom in
SO
3
?
Choices:
linear
,
trigonal planar
,
tetrahedral
,
trig-
onal bipyramidal
,
octahedral
.
Is the
SO
3
molecule polar or non-polar?
Choices:
polar
,
non-polar
.
The
SO
3
molecule can be said to use which type of S hybrid
orbitals for sigma-bonding?
Choices:
sp
,
sp2
,
sp3
,
dsp3
,
d2sp3
.
You are correct.
Your receipt is 167-9249
VSEPR
theory
predicts which molecular structure (ar-
rangement of bonded atoms about the central S atom) for
SO
3
?
Choices:
linear
,
bent (angular)
,
trigonal planar
,
trigonal pyramidal
,
T-shaped
,
tetrahedral
,
see-
saw
,
square planar
,
trigonal bipyramidal
,
square
pyramidal
,
octahedral
.
The
SO
3
molecule displays which bond angles (in de-
grees)about the central S?
Choices:
90
,
109.5
,
120
,
180
,
90 and 120
,
90 and
180
,
120 and 180
,
90, 120 and 180
.
A. (Your answer must include all bond angles about the
central atom.)
You are correct.
Your receipt is 167-482
Is the
KrF
4
molecule polar or non-polar?
Choices:
polar
,
non-polar
.
VSEPR
theory
predicts which arrangement of bonds and
lone pairs of electrons about the central Kr atom in
KrF
4
?
Choices:
linear
,
trigonal planar
,
tetrahedral
,
trig-
onal bipyramidal
,
octahedral
.
The
KrF
4
molecule can be said to use which type of Kr
hybrid orbitals for sigma-bonding?
Choices:
sp
,
sp2
,
sp3
,
dsp3
,
d2sp3
.
You are correct.
Your receipt is 167-9322