CEM 141 Exam 3 (New 2026/ 2027 Update)
Questions & Answers {Grade A} 100%
Correct (Verified Solutions) -MSU
What is happening on a molecular level when a substance boils? - Correct answer ldfs
are being overcome
How to calculate formal charge: - Correct answer VE on free atom - # bonds to atom -
non-bonded electrons
What does VSEPR stand for? - Correct answer Valence Shell Electron Pair Repulsion
VSEPR helps figure out _________ of molecule from the Lewis structure - Correct
answer shape
Assume all centers of electron density (repel/attract) each other - Correct answer
repel
,There is a minimum energy arrangement that the atom will: - Correct answer naturally
take up
When the # of electron density centers is 2, the geometry of the centers is: - Correct
answer linear
When the # of electron density centers is 3, the geometry of the centers is: - Correct
answer trigonal planar
When the # of electron density centers is 4, the geometry of the centers is: - Correct
answer tetrahedral
When the # of electron density centers is 5, the geometry of the centers is: - Correct
answer trigonal bipyramidal
When the # of electron density centers is 6, the geometry of the centers is: - Correct
answer octahedral
,When the # of electron density centers is 2, the bond angle is: - Correct answer 180°
When the # of electron density centers is 3, the bond angle is: - Correct answer 120°
When the # of electron density centers is 4, the bond angle is: - Correct answer 109°
When the # of electron density centers is 5, the bond angle is: - Correct answer 90°,
120°
When the # of electron density centers is 6, the bond angle is: - Correct answer 90°
When the # of electron density centers is 2, the orbital hybridization is: - Correct
answer sp
When the # of electron density centers is 3, the orbital hybridization is: - Correct
answer sp2
, When the # of electron density centers is 4, the orbital hybridization is: - Correct
answer sp3
When the # of electron density centers is 5, the orbital hybridization is: - Correct
answer sp3d
When the # of electron density centers is 6, the orbital hybridization is: - Correct
answer sp3d2
Lone pairs and single, double, and triple bonds each count as ____ electron density
center(s) - Correct answer one electron density center
A single bond is always a (sigma/pi) bond - Correct answer sigma
Anything more than a single bond is always a (sigma/pi) bond - Correct answer pi
Rotation around the bond is not allowed by _____ bonds - Correct answer pi bonds
Questions & Answers {Grade A} 100%
Correct (Verified Solutions) -MSU
What is happening on a molecular level when a substance boils? - Correct answer ldfs
are being overcome
How to calculate formal charge: - Correct answer VE on free atom - # bonds to atom -
non-bonded electrons
What does VSEPR stand for? - Correct answer Valence Shell Electron Pair Repulsion
VSEPR helps figure out _________ of molecule from the Lewis structure - Correct
answer shape
Assume all centers of electron density (repel/attract) each other - Correct answer
repel
,There is a minimum energy arrangement that the atom will: - Correct answer naturally
take up
When the # of electron density centers is 2, the geometry of the centers is: - Correct
answer linear
When the # of electron density centers is 3, the geometry of the centers is: - Correct
answer trigonal planar
When the # of electron density centers is 4, the geometry of the centers is: - Correct
answer tetrahedral
When the # of electron density centers is 5, the geometry of the centers is: - Correct
answer trigonal bipyramidal
When the # of electron density centers is 6, the geometry of the centers is: - Correct
answer octahedral
,When the # of electron density centers is 2, the bond angle is: - Correct answer 180°
When the # of electron density centers is 3, the bond angle is: - Correct answer 120°
When the # of electron density centers is 4, the bond angle is: - Correct answer 109°
When the # of electron density centers is 5, the bond angle is: - Correct answer 90°,
120°
When the # of electron density centers is 6, the bond angle is: - Correct answer 90°
When the # of electron density centers is 2, the orbital hybridization is: - Correct
answer sp
When the # of electron density centers is 3, the orbital hybridization is: - Correct
answer sp2
, When the # of electron density centers is 4, the orbital hybridization is: - Correct
answer sp3
When the # of electron density centers is 5, the orbital hybridization is: - Correct
answer sp3d
When the # of electron density centers is 6, the orbital hybridization is: - Correct
answer sp3d2
Lone pairs and single, double, and triple bonds each count as ____ electron density
center(s) - Correct answer one electron density center
A single bond is always a (sigma/pi) bond - Correct answer sigma
Anything more than a single bond is always a (sigma/pi) bond - Correct answer pi
Rotation around the bond is not allowed by _____ bonds - Correct answer pi bonds
