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CHE 101 Review
CHE 101 Review
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Review for Final Exam
Flashcards
75 cards
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Practice quiz
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Questions
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Answers
1
In a chemical change:
a substance changes color.
heat is always given off.
a new substance is formed.
2
Which of the following compounds can undergo hydrogen bonding?
NH3
CO2
CF4
3
The nucleus of an atom is composed of:
protons and electrons
electrons and neutrons
protons and neutrons
4
Which of the following elements is a metalloid?
Ge
U
La
5
The charge on a neutron is:
+1
0
-1
6
The rows on the periodic table are called
shells
periods
groups
7
In an isotope the
mass number
is the sum of:
protons and electrons
neutrons and electrons
protons and neutrons
8
A measure of resistance to flow is called
mass
density
viscosity
9
The amount of heat required to raise the temperature of 1 gram of water 1 degree Celsius is:
1 calorie
1 torr
1 pascal
10
Which of the following is a
heterogeneous
mixture?
salsa(a mixture of tomatoes, peppers, and other ingredients)
air (a mixture of nitrogen, oxygen, and other gases)
vinegar (a mixture of water and acetic acid)
11
Which of the following has the largest atomic radius
Cs
He
Li
12
The iron(III) ion has the following symbol:
Fe+
Fe3
Fe3+
13
Under STP conditions, one mole of a gas occupies this volume:
1 liter
22.4 liters
1 million liters
14
What is the correct name for the following formula:
NO
2
nitrogen dioxide
mononitrogen dioxide
nitrogen oxide
15
The group
VIIIA
elements are called:
free gases
noble gases
balloon gases
16
Which of the following is NOT a property of metals?
good conductors of heat
react with nonmetals
tend to form anions
17
The atomic number of an element is the number of:
protons
neutrons
electrons
18
What is the correct formula for the compound formed from the following ions:
Al
3+
+ PO
4
3-
Al3(PO4)3
Al(PO4)3
AlPO4
19
Which mass is the smallest?
1 kg
1 pg
1 mg
20
A theory is best defined as:
a unifying principle which stands up to repeated testing
a conclusion which is undoubtedly correct
a tentative explanation for a set of observations
21
The scientist who, in 1803, proposed the first atomic theory was:
Dalton
Schrodinger
Einstein
22
The type of bond resulting from sharing of electrons is called a (an):
covalent bond
hydrogen bond
ionic bond
23
Molarity (M) has the following units:
g/mol
mol/liter
g/liter
24
How many significant figures are there in
2.0970 x 10
-6
four
three
five
25
Which of the following terms is NOT associated with the quantum mechanical model of the atom?
halogen
orbital
subshell
26
Malleability
and
ductility
are properties of:
metals
gases
nonmetals
27
Amino acids are the building blocks of:
carbohydrates
proteins
nucleic acids
28
What is the correct name of the following compound?
NH
4
Cl
ammonium chlorine
ammonia chloride
ammonium chloride
29
Which of these elements is NOT found in nature in uncombined form because it is so reactive?
argon
nitrogen
potassium
30
Which of the following is NOT a unit of pressure?
kPa
mm Hg
cm2
31
The fat-soluble vitamins (ADEK) belong to the following class of compounds:
enzymes
carbohydrates
lipids
32
Which of the following molecules is polar?
HCl
CCl4
N2
33
Biologically active compounds secreted by the endocrine glands are called:
enzymes
vitamins
hormones
34
Which of the following is NOT an element?
CO
Cl2
O2
35
Compounds which have the same formula but different structure are called:
monomers
isomers
polymers
36
Which of the following compounds is a saturated hydrocarbon, also called an
alkane
?
CH3COOH
CH3OCH3
CH3CH2CH3
37
Avogadro’s number (6.022 x 10
23
) is the number of :
atoms in 1 mole of sodium
molecules in 1 gram of water
grams in 1 mole of sulfur
38
A strong acid readily produces ? in water.
hydronium ions
chloride ions
hydroxide ions
39
How many
valence electrons
are there in an atom of magnesium?
12
2
8
40
A compound is defined as
pure substance composed of two or more different elements
a combination of two atoms
a mixture of two pure substances
41
The nuclear reaction which involves splitting a heavier nucleus into two lighter nuclei is:
transmutation
fusion
fission
42
What are the strongest type of intermolecular forces in liquid bromine (Br
2
)?
hydrogen bonds
dispersion forces
dipole forces
43
A colloid is best defined as:
a molecule formed from atoms of the same element
a type of crystal formed when water evaporates
a mixture which lies between a solution and a suspension.
44
Which of the following is ionic?
H2O
Cl2
KBr
45
The smallest unit of an element, which has all the properties of the element is called:
a nucleus
a molecule
an atom
46
The number 7.9 x 10-4 may also be written:
790.0
7.900
0.00079
47
A reaction which gives off heat is called an ? reaction
exothermic
androthermic
mesothermic
48
The energy of a moving object is called:
motion energy
potential energy
kinetic energy
49
Which of the following is NOT a state of matter?
metal
liquid
gas
50
Which of the following generates H+ in water?
base
acid
salt
51
Isotopes
differ in their:
mass
atomic number
charge
52
The number 3.6964 rounded to three significant figures is:
3.700
3.70
3.69
53
Which of the following is NOT a compound?
water
F2
calcium bromide
54
Elements in the periodic table are arranged in order of increasing
atomic radius
atomic number
atomic mass
55
Which class does this compound belong to?
CH
3
NH
2
ketones
alcohols
amines
56
In which state of matter do atoms or molecules have the most freedom of movement?
solid
gas
liquid
57
Which of the following is a chemical property?
reactivity with oxygen
density
color
58
Combustion is the reaction of a substance with the following gas:
fluorine
nitrogen
oxygen
59
A compound which contains a benzene ring is called:
aliphatic
aromatic
photomatic
60
What is an
aqueous
solution?
a solution in which water is the solvent
a solution which conducts electricity
a solution which contains sodium chloride
61
What is the correct name for
HF (aq)
?
hydrofluorine acid
hydrogen fluorine
hydrofluoric acid
62
Organic chemistry deals with the compounds of:
carbon
oxygen
nitrogen
63
Approximately when did quantum theory develop?
early 1600s
ancient Greece
early 1900s
64
The pH of an acidic solution is:
less than 7
zero
greater than 7
65
Mass/Volume are the units of:
energy
density
force
66
Which is the correct formula for sodium carbonate?
NaCO3
NaCO2
Na2CO3
67
Which family of elements does calcium belong to?
transition metals
metalloids
alkaline earth metals
68
Branch of chemistry that is a study of chemical phenomena at the atomic, and molecular level
biochemistry
inorganic chemistry
physical chemistry
69
Which of the following contains the greatest number of atoms?
22.99 grams of sodium
2 moles of copper
55.85 grams of iron
70
Which of the following is
true
for
Ca
3
(PO
4
)
2
?
there are 2 phosphorus atoms per formula unit.
there are 4 oxygen atoms per formula unit.
there are 6 calcium atoms per formula unit.
71
The letters
s
,
p
,
d
, and
f
are used to designate types of:
electron orbitals
molecular crystals
covalent bonds
72
Isoelectronic species have the same number of electrons. Which are NOT isoelectronic?
Na+ and Ne
S2- and Ar
K+ and Ca
73
The branch of chemistry which deals with detecting and quantitating substances is called:
inorganic chemistry
physical chemistry
analytical chemistry
74
Which of the following is a base?
HNO3
LiOH
KBr
75
Starch and cellulose are in the following class of biomolecules:
lipids
carbohydrates
proteins
