VSPER
What is the molecular structure and electron pair geometry of H2S?
a. trigonal bipyramidal and Linear
b. linear and tetrahedral
c. bent and tetrahedral
d. tetrahedral and bent
e. linear and linear
c. bent and tetrahedral
In carbon disulfide, how many lone pairs of electrons are on each sulfur atom?
2
What is the hybridization of the central atom in a molecule of NH3?
sp3
Estimate the heat of reaction for the reaction show, given the average bond energies below:
2H2 + O2 --> 2H2O
F18 #23
-481
Which one of the following properties is least characteristic of substances composed of small, covalently-bonded molecules?
a. brittle
b. low boiling point
c. poor electrical conductor when solid
d. poor electrical conductor when molten
e. high melting point
e. high melting point
What are the bond angles present in a molecule with trigonal bipyramidal geometry?
120 only
90 only
90, 120, 180
60, 90
180 only
90, 120, 180
What is the correct Lewis structure for ClCN
Cl single bonded to C triple bonded to N
Cl has 3 lone pairs
C has 0 lone pairs
N has 1 lone pair
Determine the shape (geometry) of PCl3 and then decide on the appropriate hybridization of phosphorus in this molecule.
sp3
According to the molecular orbital theory, which of the following statements about NO+ is correct?
NO+ has a bond order of 3 and is paramagnetic
NO+ has a bond order of 3 and is diamagnetic
NO+ has a bond order of 2.5 and is paramagnetic
NO+ has a bond order of 2.5 and is diamagnetic
None of these are correct
NO+ has a bond order of 3 and is diamagnetic
Which element has the lowest electronegativity?
Li
Al
Cl
Cs
Ca
Cs
What is the molecular of BCl3 as predicted by VSPER?
trigonal planar
What is the Lewis structure for oxygen difluoride
F-O-F
Both Fs have 3 lone pairs
O has 2 lone pairs
The perchloric acid (HClO4) molecule contains...
13 lone pairs, 1 pi bond, 4 sigma bonds
9 lone pairs, no pi bonds, 6 sigma bonds
8 lone pairs, 2 pi bonds, 7 sigma bonds
8 lone pairs, 3 pi bonds, 5 sigma bonds
11 lone pairs, no pi bonds, 5 sigma bonds
8 lone pairs, 3 pi bonds, 5 sigma bonds
What is the bond order of O2+?
F18 #32
2.5
Which has the highest lattice energy?
BaO
NaI
BiBr
MgO
CaS
F18 #7
MgO
What is the molecular shape of NO2- as predicted by VSPER?
bent
Which one of the following species violates the octet rule?
BF4-
XeO3
SiCl4
NH3
CH2Cl2
XeO3
In which of the molecules below does the central atom have an sp3d2 orbital hybridization?
XeF2
H2O
CH4
XeF4
SO42-
XeF4
Ethane can be easily converted to carbon dioxide and water by addition of oxygen to there reaction. Calculate the enthalpy of reaction using the bond energies given.
Su17 #3
-4751
According to the valence bond theory, which is the best definition of a pi bond?
a. a removal and transfer of electrons from one atom to another
b. a side by side overlap of 2 p orbitals
c. the out of phase overlap of atomic orbitals, resulting in a node along the internuclear axis
d. the presence of 2 orbitals with the same energy near their respective nuclei
e. a covalent bond formed by the overlap of atomic orbitals along the internuclear axis
b.
What is the molecular shape of XeO2F2 as predicted by VSPER?
see-saw
What is the correct lewis structure for TeBr2
Br - Te - Br
Both Br have 3 lone pairs
Te has 2 lone pairs
How many lone pairs of electrons are there on a molecule of ibuprofen?
How many of the carbon atoms in an ibuprofen molecule have sp2 hybridization?
How many pi bonds are there on a molecule of ibuprofen?
How many carbon atoms in the ibuprofen structure have an sp3 hybridization?
4
7
4
6
Which of the molecules listed below does not have a bond order of 2?
O2
F22+
ONe
C2
CN+
ONe
Antibonding molecule orbitals are produced by...
a. constructive interaction of atomic orbitals
b. destructive interaction of atomic orbitals
c. the overlap of the atomic orbitals of 2 negative ions
d. all of these
e. none of these
b.