WorksheetsFLORES CHEM 1411 Compounds, Molecular Geometry & VBT
Total questions: 42
Worksheet time: 29mins
An electron domain consists of ________.
a) a nonbonding pair of electrons
b) a single bond
c) a multiple bond
a only
b only
c only
a, b, and c
Of the molecules below, only ________ is polar
CCl4
CH4
CH3Cl
SiCl4
The molecular geometry of the BCl3 molecule is ________, and this molecule is ________.
trigonal pyramidal, polar
trigonal pyramidal, nonpolar
trigonal planar, polar
trigonal planar, nonpolar
The hybridizations of nitrogen in NF3 and CO2 are ________ and ________, respectively.
sp2, sp2
sp, sp3
sp3, sp
sp3, sp3
A typical double bond consists of ________.
three sigma bonds
three pi bonds
one sigma and two pi bonds
one sigma and one pi bond
The hybridization of nitrogen in the HCN molecule is ________.
sp
sp2
sp3
s
The electron geometry of PHCl2 is _ & the molecular geometry of the molecule is _.
bent, tetrahedral
trigonal planar, trigonal pyramidal
tetrahedral,
trigonal pyramidal
tetrahedral, tetrahedral
The hybridization of orbitals on the central atom in a molecule is sp. The electron-domain geometry around this central atom is ________.
octahedral
linear
tetrahedral
trigonal bipyramidal
The angles between sp2 orbitals are ________.
120°
109.5°
90°
180°
There are _ σ and _ π bond(s) in the ethylene (H2C=CH2) molecule.
5, 1
2, 3
4, 3
3, 4
The molecular geometry consists of ________.
a) a nonbonding pair of electrons
b) a single bond
c) a multiple bond
b only
c only
a, b, and c
b and c
What is the hybridization of the central atom in a molecule with a trigonal bipyramidal electron-domain geometry?
sp
sp2
sp3d
sp3d2
Which of the following molecules has a tetrahedral molecular geometry?
NH3
BF3
CH4
H2O
Which of the following molecules is nonpolar despite having polar bonds?
H2O
CO2
NH3
CH3Cl
The Lewis structure of the CO32- ion is ________.
Of the bonds C-C, CC, and C≡C, the C-C bond is ________.
strongest/shortest
strongest/longest
weakest/longest
weakest/shortest
Based on the octet rule, aluminum most likely forms an ________ ion.
Al3+
Al4+
Al4-
Al+
For a given arrangement of ions, the lattice energy decreases as ionic radius ________ and as ionic charge ________.
decreases, increases
increases, decreases
increases, increases
decreases, decreases
C----H
N----H
O----H
O----C
Na reacts with element X to form an ionic compound with the formula Na3X. Ca will react with X to form ________.
CaX2
CaX
Ca2X3
Ca3X2
The correct formula of iron (III) bromide is ________.
FeBr2
FeBr3
FeBr
Fe3Br
Which of the following represents a molecular compound?
N2O5
Ca3(PO4)2
K2S
Cr2O3
Which formula/name pair is incorrect?
FeSO4 , iron(II) sulfate
Fe2(SO4)3 , iron(III) sulfide
FeSO3 , iron(II) sulfite
Fe2(SO3)3 , iron(III) sulfite
Aluminum reacts with a certain nonmetallic element to form a compound with the formula Al2X3. Element X must be from Group ________ .
3A
4A
5A
6A
What is the percent composition of oxygen in Ni(ClO3)2?
7.09 %
26.02%
31.43 %
42.55 %
How many grams of Ni(ClO3)2 are in 4.25 moles?
959 g
53.1 g
978 g
2.56 x 1024 g
Which intermolecular force is common to all polar molecules but NOT nonpolar molecules?
dispersion forces
dipole-dipole forces
hydrogen bonding
X-forces
none of the above
Intermolecular forces are the attractive forces between atoms within a compound.
True
False
How many atoms are in 5.80 moles of He?
6.02 × 1023
1.03 × 1023
4.00
3.49 × 1024
What is the mass percent of carbon in oxalic acid, H2C2O4?
2.24
13.3
26.7
34.5
An iron chloride compound contains 55.85 grams of iron and 106.5 grams of chlorine. What is the most likely empirical formula for this compound?
FeCl
FeCl2
Fe2Cl
FeCl3
Fe3Cl
Which of the following compounds has the highest lattice energy?
NaCl
MgO
CaF2
LiBr
What is the molecular geometry of SF6?
Trigonal bipyramidal
Tetrahedral
Octahedral
Square planar
Which of the following compounds is an ionic compound?
NaCl
H2O
CH4
CO2
