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Chapter 3 and 4 Exam
Chapter 3 and 4 Exam
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1
What is the correct name for Cl2O7?
Chlorine oxide
Dichloride oxide
Chloric acid
Dichlorine heptoxide
2
When two compounds are made up of the same number and kind of atoms, but differ in their molecular structure they are
isotopes
homologs
isomers
hydrocarbons
3
The approximate bond angles between the atoms in a molecule with a trigonal planar electron pair geometry are:
109.5°
90°
120°
180°
4
Which of the following ions is not isoelectronic with the noble gas neon?
O2-
F-
S2-
Al3+
5
How many protons and electrons are there in the iodide ion?
53 protons, 54 electrons
53 protons, 52 electrons
53 protons, 51 electrons
53 protons, 55 electrons
6
10
c
b
d
a
7
27
b
a
c
d
8
5
d
a
b
c
9
The correct name for Cr2O3 is:
chromium oxide
chromium (II) oxide
chromium (III) oxide
dichromium trioxide
10
What is the molecular geometry of CH2O?
Trigonal Planar
Linear
Tetrahedral
Trigonal Pyramidal
11
How many valence electrons does arsenic have?
5
7
3
1
12
Which of these molecules has trigonal pyramidal molecular geometry?
AlF3
NF3
SO3
BF3
13
What is the correct name for a molecule of SO3?
Sulfur trioxide
Sulfur oxide
Monosulfur Trioxide
Sulfite
14
How many protons and electrons are there in the sulfide ion?
16 protons, 18 electrons
16 protons, 17 electrons
16 protons, 16 electrons
16 protons, 15 electrons
15
Which of the following anions has the same charge as the hydroxide ion?
CO3-2
SO4-2
NO3-
PO4-3
16
Which of the following alkenes shows cis-trans isomerism?
1,1-difluorobutene
2-methyl-2-octene
3-octene
1-pentene
17
Which of the following is a structural isomer of 2-methylbutane?
2-methylpropane
n-pentane
n-butane
n-propane
18
25
a
c
b
d
19
16
a
b
d
c
20
7
c
d
a
b
21
How many electrons can be contained in the first energy level?
18
8
10
2
22
How many electrons are in the highest energy level of sulfur?
2
4
8
6
23
An ion with an atomic number of 34 and 36 electrons has a ________ charge.
+34
-2
+2
-36
24
How many isomers are there of hexane, C6H14?
4
6
5
3
25
The compound CH3(CH2)5CH3 is called:
heptane
hexane
pentane
octane
26
6
b
d
c
a
27
12
a
d
b
c
28
Which of the following is the carbonate ion?
SO42-
CO3-
CO3
CO32-
29
Which of the following is the correct condensed structural formula for octane?
CH3CH2CH2CH2CH2CH3
CH3CH2CH2CH2CH2CH2CH2CH2CH3
CH3CH2CH2CH2CH2CH2CH2CH3
CH3CH2CH2CH2CH2CH2CH3
30
3
b
d
c
a
31
The name of the following alkyl group is: CH3CH2-
Isopropyl
Propyl
Ethyl
methyl
32
The total number of valence electrons in a molecule of SOF2 is:
18
20
26
24
33
4) How many carbon atoms are in a butane molecule?
5
4
3
7
34
4
c
d
b
a
35
The approximate bond angles between the atoms in a molecule with a tetrahedral electron pair geometry are:
90°
109.5°
180°
120°
36
26
d
b
c
a
37
iA compound that is composed of only carbon and hydrogen is known as a(n):
carbohydrate
homolg
isomer
hydrocarbon
38
In order to form an octet, an atom of selenium will:
gain 2 electrons
lose 2 electrons
lose 6 electrons
gain 6 electrons
39
Which of these molecules is a tertiary amine?
R3N
R2NH
R2NH+
RNH2
40
What functional groups are present in the following structure?CH3—C≡C—CH2OH
A ketone and an alkyne
An aldehyde and a ketone
An alcohol and an alkyne
Alcohol and an alkene
41
Which of the following formulas is incorrect for a cobalt (III) compound?
CoCO3
CoPO4
Co2O3
CoCl3
42
54) Given the electronegativities below, which of the following covalent single bonds is the most polar?
O-C
N-C
O-N
C-H
43
How many electrons are in the second energy level for an atom of N?
6
5
4
8
44
Which of the following is the symbol for the chlorite ion?
ClO4-
ClO3-
ClO-
ClO2-
45
29
a
d
c
b
46
14
c
b
a
d
47
21
b
d
a
c
48
The reaction of magnesium and nitrogen produces:
Mg3N
Mg2N3
MgN
Mg3N2
49
30
c
a
b
d
50
13
b
d
a
c
51
8
a
d
b
c
52
All members of the alkene series of hydrocarbons have the general formula:
CnH2n+2
CnHn
CnH2n
CnH2n-2
53
1
d
a
c
b
54
Iron pyrite (fool's gold) is iron (II) sulfide. What is its formula?
FeSO4
FeSO3
FeS
Fe2S3
55
What is the mass of 3.61 moles of Ca?
40.0 g
0.900 g
150 g
144 g
56
How many electrons can be contained in the second energy level?
8
10
18
2
57
Which compound contains only covalent bonds?
HC2H3O2
NaCl
NH4OH
Ca3(PO4)2
58
A molecule that has both polar and nonpolar parts is said to be:
amphipathic
an isomer
an enantiomer
hydrophobic
59
Which of the following is the sulfate ion?
CO32-
SO42-
PO43-
S2-
60
What is the correct formula for dichlorine monoxide?
Cl2O
ClO
Cl2O4
ClO2
61
Which quantity contains the most moles?
10 g CH4
10 g SO2
10 g CO2
10 g SiO2
62
Which of these formulas corresponds to that of a straight-chain alkane?
C5H10
C6H12
C5H12
C7H14
63
An ion is:
a molecule such as sucrose
a substance formed by the combination of two elements
an atom or a group of atoms that carries an electrical charge
another term for an atom
64
28
a
c
d
b
65
Which quantity contains the fewest moles?
10 g N2
10 g AlH3
10 g Si
10 g CO
66
33
a
d
b
c
67
32
a
c
b
d
68
An atom of phosphorous has how many valence electrons?
8
5
6
4
69
Which of the following is one of the main cations in the body that maintains solution concentrations inside/outside cell
NH4+
Fe2+
K+
Ba2+
70
How many single bonds does an atom of carbon normally make in a covalent molecule if there are no double or triple bond?
4
3
2
1
71
The compound CH3(CH2)4CH3 is called:
heptane
pentane
butane
hexane
72
Which of these functional groups is a thiol?
R-S-S-H
R-O-H
R-S-H
R-S-S-R
73
9
a
c
b
d
74
An atom of chlorine has how many valence electrons?
2
6
4
7
75
19
a
d
b
c
76
20
d
b
c
a
77
18
a
b
d
c
78
Which of these hydrocarbons could not be a cycloalkane?
C5H10
C6H14
C4H8
C3H6
79
2
a
d
c
b
80
How many protons and electrons are there in the calcium ion?
20 protons, 20 electrons
20 protons, 19 electrons
20 protons, 22 electrons
20 protons, 18 electrons
81
11
c
b
a
d
82
23
d
b
a
c
83
What is the name and symbol of an ion that has 26 protons and 23 electrons?
Mn+2
Mn+3
Fe+3
Fe+2
84
A double bond involves the sharing of ________ electron(s) between the atoms.
2
4
1
6
85
Which atom is the most electronegative?
Cl
Li
P
Cs
86
What is the correct name for BaF2?
barium fluorine
barium fluoride
barium (II) fluoride
barium difluoride
87
31
c
a
b
d
88
What is the molecular geometry of a CO2 molecule?
Linear
Tetrahedral
Trigonal Planar
Bent
89
24
c
a
b
d
90
What is the molecular geometry of a NH3 molecule?
Tetahedral
Trigonal Pyramidal
Bent
Trigonal Planar
91
A thimble of water contains 4.0 x 1021 molecules. The number of moles of H2O is:
6.6 x 10-3
6.6 x 10-23
2.4 x 1045
2.4 x 1023
92
Which one of the compounds below is most likely to be ionic?
SrBr2
CBr4
GaAs
NO2
93
A bond where the electrons are shared unequally is called a(n):
Ionic
Coordinate Covalent
Polar Covalent
Purely (Nonpolar) covalent
94
17
d
a
b
c
95
22
c
b
a
d
96
Which one of the compounds below is covalent?
NaF
RbF
LiF
HF
97
The reaction of calcium and sulfur produces:
CaS
Ca2S
Ca2S3
CaS2
98
Which of the following is the main anion in the body?
CO32-
Cl-
SO42-
S2-
99
How many valence electrons would be found in the correct Lewis dot structure of C2H6?
14
28
10
20
