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