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Chemistry Semester 1 Exam Review Flashcards | StudBud
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Chemistry Semester 1 Exam Review
Chemistry Semester 1 Exam Review
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Review for semester 1 chemistry exam
Flashcards
98 cards
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Practice quiz
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Questions
98
Answers
1
An atom with 45 protons has a mass number of 100. It must contain how many neutrons
45
145
100
55
2
In a chemical change...
a phase change never occurs
original material can never be regenerated
products are different substances from starting materials
a phase change must occur
3
The total number of atoms represented by the formula Co
2
(SO
4
)
3
is
7
14
17
13
4
Which of the following is a binary compound
H2SO4
O2
HCN
H2S
5
How many phosphorus atoms are represented by one unit of calcium phosphate Ca
3
(PO
4
)
2
6
2
4
8
6
How many nitrogen atoms are indicated by the formula Al(NO
3
)
3
9
3
4
1
7
Mendeleev is credited with the modern atomic theory of atoms
False
True
8
Oxidation and reduction must occur simultaneiously
True
False
9
Which of the following is a chemical change
gasoline evaporating
butter melting
paper burning
water boiling
10
Dry ice subliming(turning into a gas) is a chemical change
False
True
11
Which of the following ionic compounds is soluble in water
MgS
Al2S3
K2S
CaS
12
All of the following are clues that a chemical reaction has taken place except
the reactant is smaller
bubbles form
a solid forms
a color change occurs
13
Which of the following ionic compounds is soluble in water
Na2S
Al2S3
MgS
CaS
14
A compound can consist of one kind of element
True
False
15
balance the equation, what is the coefficient in front of HCL? SiCl
4
+H
2
O > SiO
2
+ HCl
1
3
2
4
16
Which of the following is a physical change
evaporating water
decomposing meat
cooking an egg
burning gasoline
17
Which of the following ionic compounds is insoluble in water
NaCl
BaCl2
Hg2Cl2
CaCl2
18
Which of the following is an element
gas
bromine
nylon
water
19
Following solubility rules, which metal hydroxide should be soluble in water
TIOH
LiOH
AgOH
CuOH
20
Which of the ionic compounds is soluble in water
CaCO3
MgCO3
Na2CO3
Al2(CO3)3
21
The correct formula for carbon monoxide is
CH4
CO2
CO
C2O
22
Filtration usually involves separating which phases from a mixture
liquid from gas
liquid from liquid
solid from liquid
solid from gas
23
John Dalton provided the first experimental support for the atom
False
True
24
The number of protons in the nucleus of an atom is called its
mass number
atomic number
valence
isotope number
25
A substance when dissolved in water produces a solution that conducts electricity efficiently
weak electrolyte
electrical solute
strong electrolyte
strong ion
26
An example of a chemical change is
grinding coffee beans
coffee spilled on a shirt
boiling alcohol
digesting a pizza
27
Helium is an example of
a heterogenous mixture
a homogenous mixture
an element
a compound
28
The symbol for the element gold is
Au
Ag
Ga
Gd
29
Generally observed behavior that can be formulated into a statement is a
measurement
natural law
observation
theory
30
Which of the following ionic compounds is soluble in water?
AIPO4
Mg3(PO)4
(NH4)3PO4
Ca3(PO4)2
31
potassium chloride is mixed with an sodium nitrate what is the solid formed?
KNO3
NaNO3
KCl
There is no solid formed
32
How many significant figures are in the number 10.050
3
1
4
5
33
The name for NH
4
Br is
ammonium bromide
nitrogen hydrogen bromide
nitrogen tetrahydrogen bromide
ammonium(I) bromide
34
In naming compounds, the cation is always named first and the anion second
True
False
35
The complete ionic equation contains only substances directly involved in reactions
False
True
36
Ernest Rutherford proved the existence of a nucleus by the gold foil experiment
False
True
37
The number 0.00003052 expressed in exponential notation is
3.1 x 10-5
3.052 x 10-4
3.052 x 105
3.052 x 10-5
38
How many electrons are present in a fluorine F atom
11
18
10
9
39
Which of the following is an element
wood
iron
blood
water
40
which of the following is only a physical change
sugar dissolves in coffee
leaves turn colors in the fall
a banana ripens
cookies burn in an oven
41
The total number of oxygen atoms indicated by the formula Cr
2
(CO
3
)
3
12
6
9
3
42
What is the formula for phosphorus pentachloride?
P5Cl5
P5Cl2
PCl5
P5Cl
43
Potassium chlorate has the formula
KClO3
KClO
KClO2
KCl
44
How many atoms are represented by one formula unit of aluminum sulfite, Al
2
(S
4
)
3
3
12
18
14
45
What is the formula for trinitrogen pentachloride
N3Cl5
N3Cl7
N4Cl5
N3Cl6
46
An atom with 15 protons and 16 neutrons is an atom of
Ga
Pd
S
P
47
What is the formula for calcium hydroxide
Ca(OH)3
Ca(OH)2
Ca2(OH)3
CaOH
48
53.4 degrees C is equal to
11.9 degrees F
64.1 degrees F
-219.6 Kelvin
128.1 degrees F
49
Which of the following contains the largest number of oxygen atoms
4H2O
Al(NO3)3
3CO2
O3
50
Which of the following ions does not have a -2 charge
carbonate
chlorate
sulfate
sulfite
51
An atom with 40 protons has a mass number of 92. The atom is
Zr
Hg
U
Te
52
Distillation usually involves converting which phases of a mixture?
liquid to gas
solid to liquid
solid to gas
liquid to solid
53
The name of the NO
2
_
ion is
nitroxide
nitrate
nitrite
nitric
54
Energy in an atom is quantized so when electrons fall to ground state white light is observed
False
True
55
Diamond is a __ state of matter
solid
liquid
unknown
gaseous
56
Which of the following is a homogenous mixture
jar of jelly beans
gasoline
soil
pure water
57
Which of the following elements has a symbol that does not come from the English name
boron
cobalt
silver
argon
58
Which of the following involves a chemical change
chopping wood
cooking an egg
melting ice
boiling water
59
The first scientists to develop the theory that all atoms of a given element are identical was
Lord Kelvin
John Dalton
Ernest Rutherford
J.J. Thomson
60
Which of the following ionic compounds is soluble in water?
Al2(CO3)3
(NH4)2CO3
MgCO3
CaCO3
61
J.J. Thompson proved that electrons travel in elliptical orbits around the nucleus
True
False
62
In what type of reaction is water always a product?
decomposition
precipitation
oxidation
acid-base
63
Juice freezing into a popsicle is an example of a physical change
True
False
64
Which of the following is a chemical change
peanuts are crushed
a "tin" can rusts
a damp towel dries
Water condenses on a mirror
65
The correct formula for silver iodide is
AgI2
SI
Ag2I
Agl
66
How many hydrogen atoms are indicated by the formula (NH
4
)
2
C
3
H
2
O
2
11
10
6
8
67
The reaction HI(
aq
) + KOH(
aq
) > H
2
O(
l
) + KI(
aq
) is a(n) __ reaction
precipitation
single replacement
oxidation-reduction
acid-base
68
How many electrons are transferred: Zn(
s
) + 2AgNO
3
(
aq
) > Zn(NO
3
)
2
(
aq
) + 2Ag(
s
)
1
3
2
4
69
Which will be spectator ions in the reaction of lead(II) nitrate and potassium chlorate
K+ and Cl-
Pb2+ and Cl-
K+ and NO3-
Pb2+, K+, CL- and NO3-
70
Na
+
represents a
sodium atom
potassium ion
potassium atom
Sodium ion
71
The correct formula for the ammonium ion is
N4H+
NH4+
NH+
NH42+
72
The fundamental unit of mass in the metric system is the
meter
kilogram
gram
milligram
73
How many neutrons are contained in an iodine nucleus with a mass number of 132
128
53
79
75
74
The name for Ba(NO
3
)
2
is
barium dinitrate
barium(II) nitrate
barium nitrite
barium nitrate
75
The correct name for P
2
O
5
is
phosphorus(V) oxide
phosphorous(II) oxide
diphosphorus oxide
diphosphorus pentoxide
76
A reaction that involves a transfer of electrons is a(n) __ reaction
precipitation
double-displacement
oxidation-reduction
acid-base
77
3.0 kilograms contain this many grams
3.0 x 102
3.0 x 103
3.0 x 101
3.0 x 10-2
78
The correct formula for lead(IV) nitrate is
Pb2(NO2)4
Pb4NO3
Pb(NO3)4
Pb(NO)4
79
The mass number of an atom equals
the atomic mass of the element
the number of neutrons per atom
the number of protons plus the number of neutrons per atom
the atomic number of the element
80
What is the formula for potassium carbonate
KCO3
KC
PC
K2CO3
81
Metal rusting is an example of a chemical change
True
False
82
How many significant figures are in the number 0.00204
3
6
2
5
83
The state of matter for an object that has neither definite shape nor definite volume is
liquid
elemental
solid
gaseous
84
What is the correct formula for barium hydroxide
Ba(OH)3
Ba2OH
Ba(OH)2
BaOH
85
An example of a pure substance is
all of these
elements
pure water
compounds
86
The charge on a potassium ion in its ionic compound is
-1
+2
+3
+1
87
The symbol Ca stands for the element
cadmium
calcium
cesium
carbon
88
The symbol for the element boron is
Bor
Be
B
Bn
89
How many atoms of hydrogen are in three molecules of C
4
H
5
Cl
3 x 1023
6 x 1023
5
15
90
The measurement 8.1 x 10
3
g also could be written as
8.1 mg
8.1 kg
8.1 pg
8.1 g
91
How many electrons are present in a bromine atom with a mass number of 87
35
122
87
52
92
How many oxidation-reduction: metal w/nonmetal synthesis combustion precipitation decomposition
2
3
4
1
93
Express the number 178499 in scientific notation
1.78 x 105
1.78499 x 105
1.78499 x 10-5
1.8 x 10-5
94
Chemistry is the science that deals with materials of the universe & changes they undergo
True
False
95
A certain isotope X
2+
contains 46 electrons & 39 neutrons. Whats the mass number of the element
85
83
87
48
96
The chemical formula Ga
2
O
3
indicates
6 atoms of each element
2 atoms of gallium & 3 atoms of oxygen
5 atoms of each element
3 atoms of gallium & 2 atoms of oxygen
97
Which of the following elements has a symbol that doesn't come from the English name
argon
cobalt
potassium
boron
98
Which of the following is a noble gas
O2
CO2
N2
Ar
