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Unformatted text preview: First hour practice exam "b" solution key:
1c, 2b, 3a, 4a, 5e, 6a, 7b, 8d, 9e, 10d, 11e, 12a, 13b, 14b, 15b, 16c, 17d, 18c, 19e, 20e, 21c
22) Word problem
The molecule CO (carbon monoxide) is formed in the
partial oxidation of gasoline in car engines, and further
oxidizes to CO2. It is odorless, colorless, and extremely
toxic because it binds irreversibly to hemoglobin in the
blood, leading to asphyxiation. C O *
c') b +0.5
+0.5 z-axis a) fill the MO diagram in the box with the
correct number of electrons for CO
b) Label all the orbitals in the box in part a
as "b", "nb" or "*" for bonding,
nonbonding, and antibonding character. +2 nb
nb +3 or * +0.5
b +0.5 +4c) sketch one of the "c)" and one of the "c')" molecular orbitals in the box below with correct signs:
c) C c') O C O Note: correctly
polarized pairs of
are also acceptable +2d) What will happen to liquid CO when it is poured between the poles of a magnet?
It will not stick (diamagnetic)
+2e) What is the bond order of CO? 3 +2 +1 Structure/charge:
tructure for CO, and mark
+3f) Draw aOreasonable Lewis dot spartial charge/direction the
C and "+" or "-" to indicate
of the dipole moment for your structure. Does your structure
satisfy the octet rule? :C!O: "- "+ Octet rule? yes ...
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This note was uploaded on 10/10/2011 for the course CHEMISTRY 202 taught by Professor Grubele during the Spring '11 term at University of Illinois, Urbana Champaign.
- Spring '11