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Chemistry Final
Chemistry Final
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This is the Chemistry final study questions for Honors Chemistry Mrs. Stockbridge Niceville High
Flashcards
250 cards
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Practice quiz
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Host live
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Questions
250
Answers
1
A molecular compound has the empirical formula XY₃. What is a possible molecular formula?
X₂Y5
X₂Y₆
X₂Y3
XY4
2
At constant temperature and pressure, gas volume is directly proportional to the
density of the gas at STP
number of moles of gas
molar mass of the gas
rate of diffusion
3
In what kind of reaction do two or more substances combine to form a new compound?
ionic reaction
double displacement reaction
synthesis reaction
Decomposition reaction
4
The coefficients in a chemical equation represent the
number of atoms in each compound in a reaction
masses, in grams, of all reactants and products
number of valence electrons involved in the reaction
relative numbers of moles of reactants and products
5
For the reaction AgNO
3
+ NaCl→NaNO
3
+AgCl, how many moles of AgCl are made from 7.0mol of AgNO
3
?
21 mol
7.0 mol
1.0 mol
2.3 mol
6
An acid base titration involves a
Composition reaction
Single-displacement reaction
Neutralization reaction
Decomposition reaction
7
if force is held constant as surface area decreases,
increases
increases or decreases depending on the volume change
remains constant
decreases
8
In wA + xB --> yC + zD, you know the mass of A & the molar masses of A,B,C, and D, determine
the total mass of C and D only.
the mass of any of the reactants or products
the total mass of A and B only.
the mass of B only
9
Name the compound N
2
O
2
using the Stock system.
nitrogen dioxide
dinitrogen monoxide
nitrogen(II) oxide
nitrogen oxide(II)
10
which coefficients correctly balance the formula equation CaO + H₂O = Ca(OH)₂?
1,2,1
2,1,2
1,1,1
1,2,3
11
The ph scale in general use ranges from
0 to 1
0 to 14
-1 to 1
0 to 7
12
For 2Na+2H
2
O→2NaOH H
2
, how many grams of NaOH are produced from 3.0 mol of Na with excess H
2
O?
80g
120g
240g
40g
13
a binary acid contains
two hydrogen atoms
Hydrogen and two other elements
Hydrogen and one other element
hydrogen and three other elements
14
A base is weak if its tendency to
Attract a proton is slight
Donate a proton is great
Attract a proton is great
Donate a proton is slight
15
For 2HNO
3
+Mg(OH)
2
→Mg(NO
3
)
2
+2H
2
O, how many grams of Mg(NO
3
)
2
are produced from 8.00 mol of HNO
3
?
148g
445g
593g
818g
16
If [H
3
O
+
] = 8.26 × 10
-5
M, what is the pH of the solution?
2.161
8.024
4.083
3.912
17
What kind of rxn do ions of 2 compounds exchange place in aqueous soln to form 2 new compounds?
synthesis reaction
double-replacement reaction
decomposition reaction
composition reaction
18
The Word equation - sodium oxide + water→sodium hydroxide, the formula for sodium hydroxide is
Na2O
Na2OH
NaO2
NaOH
19
A compound contains 27.3g of C and 72.7g of O. What is the empirical formula for this compound?
CO
CO₂
C2O4
C2O
20
When titrating a weak acid with a strong base, what is the equivalence point?
Below pH of 7.0
At a pH of 7.0
Above pH of 7.0
cannot be determined
21
The conjugate of a weak acid is a
Strong Acid
Strong Base
Weak Base
Weak Acid
22
Solids have a definite volume because...
the particles are far apart
the energy of the particles is high
The particles do not have a tendency to change positions
they can be easily compressed
23
Whose acid definition is the broadest?
Lewis
Faraday
Brønsted-Lowry
Arrhenius
24
A Lewis acid is
an electron-pair acceptor
a proton acceptor
a proton donor
an electron pair donor
25
The ideal gas law is equivalent to Boyle's law when
R equals zero
the number of moles and the pressure are constant
the number of moles and the temperature are constant
the pressure is 1 atm
26
Why would a camper near top of Mt. Everest find water boils at less than 100 degrees celsius?
the atmosphere has less moisture
the flames are hotter at that elevation
There is a greater atmospheric pressure than at sea level
there is less atmospheric pressure than at sea level
27
How many oxygen atoms are there in .500 mol of CO₂?
6.02 x 1023
15.9994
3.01 x 1023
11.0
28
Calculate the approximate vol of a 0.60 mol sample of gas at 15.0°C and a pressure of 1.10 atm.
139L
22.6 L
12.9L
22.4 L
29
The equation A + X→AX is the general equation for a(n)
combustion reaction
ionic reaction
double-replacement reaction
synthesis reaction
30
Which expression represents the concentration of OH
-
ions in solution
10-14÷[H3O+]
[OH-]÷10-14
10-14×[H3O+]
10-14-[H3O+]
31
Calculate the molarity of a Ba(OH)
2
solution if 1900 mL is titrated by 261 mL of 0.505 M HNO
3
.
0.0173 M
0.0322 M
0.0254 M
0.0347 M
32
How many x's greater is the rate of effusion of O
2
gas than CO
2
at the same T and P?
6.633
1.173
1.375
2.173
33
The members of a conjugate acid-base pair
appear on opposite sides of the chemical equation
might appear on opposite/same sides of the chemical equation
Are not included in the chemical equation
appear on same sides of the chemical equation
34
SO
3
+H
2
O→H
2
SO
4,
calculate % yield if 500g of SO
3
react w/ excess H
2
O to produce 575 g of H
2
SO
4
93.9%
88.3%
82.7%
91.2%
35
A pressure of 745 mm Hg equals
745 pascal
745 torr
1 torr
1 pascal
36
what is the word equation represents the reaction that produces water from hydrogen and oxygen
H2 + O2 → water
Water is produced from hydrogen and oxygen
Water can be separated into hydrogen and water
hydrogen plus oxygen yields water
37
How many Mg²⁺ ions are found in 1.00 mol of MgO?
3.01 x 1023
12.04 x 1023
6.02 x 1023
6.02 x 1025
38
The molar mass of NH₃ is 17.03 g/mol. How many moles of NH₃ are present in 107.1 g?
107.1 mol
3.614 mol
6.289 mol
0.1623 mol
39
What is the percentage composition of CF₄
20% C, 80% F
13.6% C, 86.4% F
16.8% C, 83.2% F
81% C, 19% F
40
what is the formula for the compound formed by lead(II) ions and chromate ions?
Pb2(CrO4)2
Pb2CrO4
PbCrO4
Pb(CrO4)2
41
If a gas with an odor is released in a room, it can quickly be detected across the room because
it condenses
it is compressed
it is dense
it diffuses
42
A gas is V =14.8ml T=11.0
o
C and P=710 mmHg. calculate V gas at 20.0
o
C and 740 mm Hg?
15ml
14.6ml
7.8ml
13.7ml
43
Which quantity is directly measured in titration
volume
Density
Mass
Concentration
44
The compressibility of solids is generally...
higher than the compressibility of gasses only
about equal to the compressibility of liquids and gasses
Lower than the compressibility of liquids and gasses
higher than the compressibility of liquids only
45
Dyes with pH-sensitive colors are used as
Titrants
None of the Above
Indicators
Primary Standards
46
What determines the average kinetic energy of the molecules of any gas?
pressure
molar mass
temperature
temperature and pressure
47
What is the formula for hydrochloric acid?
HClO
HF
HCl
H2CO3
48
A substance that ionizes nearly completely in aqueous solutions and produces H
3
O+ is a
weak acid
strong base
Strong acid
weak base
49
The conjugate of a strong acid is a
Strong Base
Strong Base
Weak Base
Weak Acid
50
2KClO
3
(s) → 2KCl(s) + 3O
2
(g) is a(n)
decomposition reaction
combustion reaction
ionic reaction
synthesis reaction
51
What determines the average kinetic energy of the molecules of any gas?
Temperature
molar mass
pressure
container volume
52
What is the balanced equation for the combustion of sulfur?
S(s) + O2(g)→SO2(g)
S(s) + O2(g)→SO (g)
S(s) + 2O2(g)→SO42- (aq)
2S(s) + 3O2(g)→SO3 (g)
53
Compound's empirical formula is CH. If the formula mass = 26 amu, what's the molecular formula?
C₂H₂
CH3
C4H
CH4
54
Oxides of active metals, such as CaO, react with water to produce
metal hydroxides
acids
metal hydrides
metal carbonates
55
The conjugate of a strong base is a
Strong Acid
Weak acid
Strong Base
Weak Base
56
To balance a chemical equation, it may be necessary to adjust the
subscripts
formulas of the products
coefficients
number of products
57
Unlike in an ideal gas, in a real gas...
the particles cannot diffuse
all particles move in the same direction
The particles exert attractive on each other
all particles have have the same kinetic energy
58
The ideal gas law combines Boyle's law, Charles's law, Gay-lussac's law, and
Raoult's law
Dalton's principle
Avogadro's law
Grahams law
59
The reaction Mg(s) + 2HCl(aq)→ H
2
(g) + MgCl
2
(aq) is a
double-displacement reaction
composition reaction
decomposition reaction
single-displacement reaction
60
Which substance solid state consist of covalent molecular crystals?
sodium
diamond
water
salt
61
What is the measured amount of a product obtained from a chemical reaction?
theoretical yield
percentage yield
actual yield
mole ratio
62
What is an Arrhenius acid
oxygen that ionizes to form oxygen ions
hydrogen that does not ionize
hydrogen that ionizes to form hydrogen ions
oxygen that ionizes to form hydroxide ions
63
What is the percentage composition of CuCl₂?
65.50% Cu, 34.5% Cl
47.27% Cu, 52.73% Cl
50% Cu, 50% Cl
33% Cu, 66% Cl
64
Liquid-vapor system at equilib kept const. temp while vol is doubled. When equilib is restored
the volume of the liquid has increased significantly
the vapor pressure is the same as original vapor pressure
the concentration of vapor molecules has decreased
the number of liquid molecules has increased
65
Equal V of diatomic gases under the same conditions of T and P contain the same number of
electorns
ions
molecules
protons
66
When a slightly soluble solid compound is produced in a double-displacement reaction a
combustion reaction takes place
gas bubbles give off
precipitate is formed
halogen is produced
67
a Lewis base is a
electron pair acceptor
proton acceptor
a producer of OH- ions
electron pair donor
68
List of elements arranged by ease that they undergo certain chemical reactions
reactivity list
periodic list
reaction sequence
Activity series
69
Moles of H
2
produced when 23g Na react with H
2
O in the equation 2Na +2H
2
O →2NaOH+ H
2
?
0.50 mol
2.0 mol
1.0 mol
4.0 mol
70
When titrating a strong acid with a strong base, what is the equivalence point?
Will be above pH 7.0
Will be at pH 7.0
Will be above or below a pH of 7.0
Will be below pH 7.0
71
the complete balanced equation for the reaction between zinc hydroxide and acetic acid is?
Zn(OH)2 + CH3COOH→ Zn + 2CO2 +3H2O
ZnOH + CH3COOH→ZnCH3COO + H2O
Zn(OH)2 + 2CH3COOH→Zn(CH3COO)2 + 2H2O
Zn(OH)2 + 2CH3COOH →Zn(CH3COO)2 + H2 + O2
72
What is the transition interval for phenolphthalein
pH 6.4-8.0
pH 3.1-4.4
pH 6.2-7.6
pH 8.0-10.0
73
What is the study of the mass relationships of elements in compounds?
Avogadro's principle
composition stochiometry
reaction stochiometry
percentage yield
74
what is the transition interval for phenol red
pH 8.0-10.0
pH 6.2-7.6
pH 6.4-8.0
pH 3.1-4.4
75
What acid is manufactured in largest quantity
sulfuric acid
nitric acid
phosphoric acid
Hydrochloric acid
76
For the equation Cl
2
+2KBr → 2KCl+Br
2
, how many mol of 2KCl are produced from 119 g of 2KBr?
1.0 mol
0.119 mol
0.236 mol
0.581 mol
77
A chemist interested in the efficiency of a chemical reaction would calculate the
percentage yield
mole ratio
rate of reaction
energy released
78
What is the formula for silicon dioxide?
S2O
Si2O
SiO2
SO2
79
Some acids, such as carbonic acid, decompose to nonmetal oxides and
a salt
water
Oxygen
peroxide
80
What is the ph of a neutral solution at 25°C
1
7
14
0
81
according to the kinetic molecular theory how does gas expand?
collisions between particles become elastic
it's temperature rises
it's particles move greater distances
Its particles become larger
82
What is the molarity of a Ba(OH)
2
soln if 93.9 mL is titrated by 15.3 mL of 0.247 M H
2
SO
4
?
0.0101 M
0.0201 M
0.0805 M
0.0402 M
83
The two members of a conjugate acid-base pair differ by a
hydroxide ion
hydronium ion
proton
water molecule
84
Vol of gaseous reactants & products in a reaction is expressed as ratios of small whole numbers
if constant temp and pressure are maintained
if all the reactants and products are gasses
if each mass equals 1 mole
if standard temperature and pressure are maintained
85
What is the oxidation number of oxygen in most compounds?
+1
-8
-2
0
86
A species that is formed when a base gains a proton is a
conjugate base
Strong acid
conjugate acid
Strong base
87
How many OH⁻ ions are present in 3.00 mol of Ca(OH)₂?
3.61 x 1024
2.06 x 1023
6.0
3.0
88
In the reaction represented by the equation HF + H
2
O = H
3
O+ + F-, a conjugate acid-base pair is
HF and F-
HF and H2O
F- and H20
H3O+ and HF
89
The ph of a basic solution is
Less than 0
less than 7
Greater than 14
Greater than 7
90
about what temperature does water reach its maximum density?
0oC
4oC
2oC
6oC
91
A 1.00 L sample of a gas has a mass of 1.25 g at STP. What is the mass of 1.00 mol of the gas?
22.4g
0.855g
28.0g
1.25g
92
At it's triple point, water can
only be present as vapor
exist only as a solid
can exist in equilibrium in three different phases
have only three different pressure values
93
In the equationHClO4+NH3<----> NH4++ClO4-CLO4- is a weak base and HClO4 is a
Weak Base
Weak Acid
Strong Base
Strong Acid
94
Predict what happens when nickel is added to a solution of potassium chloride
Potassium nickel chloride forms
Hydrochloric acid forms
No reaction occurs
Nickel chloride forms
95
2HCl(g) → H
2
(g) + Cl
2
(g). How many grams of HCl (36.5 g/mol), given 10 L of Chlorine at STP?
30.2 g
36.5 g
32.6 g
15.8 g
96
the V of O
2
is 300.0mL when P is 1 atm and T=27.0
o
C. At what T is V =1.00L and P= 0.50atm?
45.0oC
0.50 K
22.0oC
227oC
97
Name the compound Fe(NO
3
)
2
Iron (III) nitrate
Iron(II) nitrite
Iron(II) nitrate
Iron(III) nitride
98
Which expression represents the ph of a solution
-log[H3O+]
log[OH-]
log[H3O+]
-log[OH-]
99
Which compound is produced by a neutralization?
H2O
H3PO4
HNO3
Ca(OH)2
100
How would you classify KOH in the equation below? KOH(aq) → K
+
(aq) + OH
-
(aq)
A strong Acid
A weak base
A weak Acid
A strong Base
101
the name of a binary acid
has no prefix
begins with the prefix hydro
begins with the prefix bi
ends with the suffix ous
102
chemistry dealing w/ mass relationships of elements and masses between reactants/products
chemical kinetics
quantitative analysis
entropy
stoichiometry
103
A chemical equation is balanced when the
same # of each atom appears in the reactants and products
coefficients of reactants = the coefficients of products
products and reactants are the same chemicals
subscripts of the reactants = the subscripts of the products
104
The gas pressure inside a container decreases when
the number of molecules is increased and the T is increased
the number of gas molecules is increased
the number of gas molecules is decreased
the temperature is increased
105
Which of the following is not a property of covalent network crystals?
high melting point
hardness
brittleness
high conductivity
106
What is the mass percentage of chlorine in NaCl?
35.45%
50%
60.7%
64.5%
107
if the percentage yield is equal to 100% then
the actual yield is equal to the theoretical yield
the actual yield is less than the theoretical yield
the actual yield is greater than the theoretical yield
the actual yield is greater than the theoretical yield
108
An acid having the suffix -ic produces an anion having the
suffix -ous
suffix -ate
prefix -hydro
suffix -ite
109
What is the pH of 10
-4
M HCl solution
4
8
10
6
110
What is the small whole number that appears in front of a formula in a chemical equation?
a ratio
a subscript
a coefficient
a superscript
111
Whose theory of acids and bases do conjugate acids and bases belong to
Brønsted-Lowry
None of the above
Lewis
Arrhenius
112
which of the following is a crystalline solid?
a glass bottle
a three dimensional glass cube
a plastic milk container
a quartz rock
113
Which reaction does not occur?
2HCl(aq) +Mg(s) --> MgCl2(aq) + H2(g)
Fe(s) + CuCl2(aq) --> FeCl2(aq) + Cu(s)
2Na(s) + ZnF2(aq) --> 2NaF(aq) + Zn(s)
2HF(aq) + Cl2(g) --> F2(g) + 2HCl(aq)
114
The reaction of calcium oxide, CaO, with water yields...
carbon dioxide and water
calcium hydroxide
calcium and oxygen gas
calcium and salt
115
Forces holding particles together are strongest in a...
liquid
Solid
vapor
gas
116
A balanced chemical equation allows one to determine the
energy released in a reaction
mechanism involved in the reaction
electron configuration of all elements in the reaction
mole ratio of any two substances in the reaction
117
Which reactant controls the amount of product formed in a chemical reaction?
limiting reactant
composition reactant
excess reacrant
mole ratio
118
In a compound, the algebraic sum of the oxidation numbers of all atoms equals:
The charge of the compound
0
1
8
119
Which of the following is a strong base
HCl
H2
NH3
KOH
120
The density of a substance undergoes the greatest change when the substance changes from a
liquid to a solid
a molecular solid to oan ionic solid
liquid to a gas
solid to a liquid
121
During an acid-base titration, when does a very rapid change in pH occur?
Does not occur during titration
Occurs when the first addition of the known solution is made
occurs when it is close to the equivalent point
occurs at several points during the titration
122
Which is an example of effusion?
air slowly escaping from a pinhole in a tire
the aroma of a cooling pie spreading across a room
helium dispersing into a room after a balloon pops
oxygen and gasoline fumes mixing in an automobile carburetor
123
Molar enthalpy of fusion for H
2
O is 6.008 kJ/mol. amt of kJ... when 253g of liq H
2
O freezes
(Molar mass of water is 18.02 g/mol) 2.33 kJ
(Molar mass of water is 18.02 g/mol) 84.4 kJ
(Molar mass of water is 18.02 g/mol) 759kJ
(Molar mass of water is 18.02 g/mol) 0.429kJ
124
The triple point of a substance is the temperature and pressure conditions at which
density is greatest
equilibrium cannot occur
states of a subsistence coexist at equilibrium
kinetic energy is at a minimum
125
A chemical formula for a molecular compound represents the composition of
c. The ions that make up the compound.
d. the crystal lattice.
a. a molecule.
b. an atom.
126
when heated, metallic chlorates decomposes into
a metal and a compound of chlorine and oxygen
metallic chlorides and oxygen
metallic oxides and cholrine
a metal, chlorine, and oxygen
127
The molar mass of LiF is 25.94 g/mol. How many moles of LiF are present in 10.37 g?
36.32 mol
0.3998 mol
1.333 mol
2.50 mol
128
A Brønsted-Lowry base is a(n)
proton acceptor
electron pair acceptor
producer of OH- ions
electron pair donor
129
How does molar enthalpy of fusion of ice compare with molar enthalpy of fusion of other solids?
it's about the same
it is relatively large
it's relatively small
it's about the same as that of colorless solids
130
In the reaction 2Al
2
O
3
→ 4Al + 3O
2
, what is the mole ratio of aluminum to oxygen?
3:4
4:3
2:3
10:6
131
The molarity of an H
3
PO
4
soln if 358 mL is titrated by 876 mL of 0.0102 M Ba(OH)
2
solution?
0.0166 M
0.0250 M
0.011 M
0.0333 M
132
114mL of 0.00804 M NaOH titrates 118mL of H
3
PO
4
soln, what is the molarity of the H
3
PO
4
soln?
0.0105 M
0.00259 M
0.00777 M
0.00518 M
133
During boiling, the temperature of a liquid
remains constant
decreases
increases
approaches water's boiling point
134
A compound contains 64 g of O and 8 g of H. What is the empirical formula for this compound?
H2O2
HO2
HO
H2O
135
an acid-base titration, at what point are eqiv quantities of hydronium ions and hydroxide ions
Throughout the Titration
At the beginning point
At the midpoint
At the End point
136
Which indicator is used to study neutralizations of strong acids with strong bases?
methyl orange
none of the above
bromothymol blue
phenolphthalein
137
What is molarity of HCl soln if 50.0 mL is neutralized in a titration by 40.0 mL of 0.40 M NaOH
0.200 M
0.280 M
0.320 M
0.500 M
138
In the equation CH3COOH+H2O<--->H3O++CH3COO-H2O is a weak base and H3O+ is a
Strong Base
Weak Base
Weak Acid
Strong Acid
139
Why does the air pressure inside the tires of a car increase when the car is driven?
Air particles inside the tire increase speed because Temp ↑
some of the air has leaked out
air particles collide with tire after the car is in motion
the atmosphere compresses the tire
140
Which of the following is chloric acid
HClO2
HClO4
HClO3
HClO
141
The equation AX + BY → AY + BX is the general equation for a
decomposition reaction
single-replacement reaction
synthesis reaction
double-replacement reaction
142
An active metal and a halogen react to form a(n)
hydroxide
acid
oxide
salt
143
kinetic-molecular theory explains properties of solids, liquids, and gases in terms of energy
the mass of the particles
diffusion
of particles and the forces that act between the particles
gravitational forces
144
For 2Na + 2H
2
O→ 2NaOH + H
2
, how many grams of H
2
are produced from 120g sodium and 80g H
2
O?
4.5g
80g
45g
200g
145
In what kind of reaction does a single compound produce two or more simpler substances?
single displacement reaction
Decomposition reaction
ionic reaction
synthesis reaction
146
In the reaction represented by the equation Ag+(aq) +2NH
3
(aq) = [Ag(NH
3
)
2
]+ (aq) , Ag+ is a
Bronsted-Lowry acid
Bronsted-Lowry base
Arrhenius base
Lewis acid
147
to balance a chemical equation, it may by necessary to adjust the...
number of products
coefficients
formulas of the products
subscripts
148
What can be predicted by using an activity series?
whether a certain chemical reaction will occur
the melting points of elements
the electronegativity values of elements
the amount of energy released by a chemical reaction
149
In the reaction N
2
+3H
2
→ 2NH
3
, how many moles of nitrogen are needed to make 18 mol of ammonia?
9.0 mol
18 mol
27 mol
36 mol
150
2 unequal molar mass gases inject into opp. ends of tube @ same time& diffuse They begin to mix
closer to the end that held the heavier gas
closer to the end that held the lighter gas
in approximately 5 min
exactly in the middle
151
Pb(NO
3
)
2
(aq) + 2KI(aq) →PbI
2
(s) + 2KNO
3
(aq) is a
decomposition reaction
synthesis reaction
combustion reaction
double-replacement reaction
152
word equation solid carbon + 0
2
gas --> CO
2
gas + energy represent a chemical rxn because...
the reaction releases energy
CO2 has chemical properties that differ from those of C & O
the reaction absorbs energy
CO2 is a gas, and carbon is a crystal
153
A chemical formula include symbols of the elements in the compound and subscripts that indicate
charges on the elements or ions
# of atoms of each element that are combined in a compound
formula mass
Atomic mass of each element
154
2 gases have same temp but different pressure. The kinetic-molecular theory does not predict...
molecules in both gases have the same average kinetic energy
Both gases have the same densities
all collisions of the molecules are elastic
molecule in low-pressure gas travel farther before colliding
155
Which of the following did Arrhenius theorize?
Because acids and bases carry electric current
an acid increases the concentration of OH- ions in solution
a base increases the concentration of H+ ions in solution
acids and bases contain nonpolar molecules
156
In the reaction N
2
+ 3H
2
→ 2NH
3
, what is the mole ratio of hydrogen to ammonia?
1:1
3:2
6:8
2:1
157
How many molecules are there in 5.0 g of methyl alcohol, CH₃OH?
3.0 x 1024
3.6 x 1024
9.4 x 1022
3.8 x 1024
158
Which of these can happen due to decreasing the average energy of a liquid's particles?
a random arrangement
vaporization
evaporation
Freezing
159
Under similar P and T, equal V of gases contain the same # of molecules is attributed to
Graham
Dalton
Boyle
Avogadro
160
Which of the following gases does not dissolve in atmospheric water to produce acidic solutions
CO2
NO
NO2
O2
161
In the reaction represented by equation NH
3
+H
2
O→NH
4
+
+OH
-
, H
2
O is a(n)
lewis base
Brønsted-Lowry Acid
Brønsted-Lowry base
Arrhenius
162
If the height of mercury in a barometer at 0ºC is less than 760 mm Hg, then
the atmospheric pressure is ↑ standard atmospheric pressure
the atmospheric pressure is = standard atmospheric pressure
the atmospheric pressure is ↓ standard atmospheric pressure
the atmospheric pressure cannot be determined
163
The P&T of gas are constant & some gas is +/- to the container, change in what can be observed
Elasticity
Kinetic energy
Fluidity
Volume
164
Fe + O2→FeO2 (87.8 g/mol). How many grams of FeO2 can be produced from 50.0 L of 0
2
at STP?
50 g
37.8 g
196. g
19.5 g
165
An element in the reactivity series can replace ant element
in its group
above it on the list
below it on the list
in the periodic table
166
Name the compound Al
2
S
3
Aluminum(II) sulfate
Aluminum sulfide
Aluminum sulfur
Aluminum sulfate
167
how many x's greater is rate of effusion of Fl gas than that of Br gas, at the same T and P
3.062
2.051
7.280
4.450
168
What is the oxidation number of hydrogen in KH?
0
+2
-1
+1
169
standard pressure is exactly
101.325 atm
1 atm
760 atm
101 atm
170
A sample of gas at 25
o
C has a V=11 L and P= 660 mmHg. How many moles of gas are in the sample?
0.39mol
9.3mol
3.9mol
87mol
171
What acid is produced in the stomach
nitric acid
phosphoric acid
sulfuric acid
Hydrochloric acid
172
A cold morning T= -13º, P in a tire is 1.5 atm. V is constant, what is P after warmed to 15ºC
19.5atm
3.0atm
-1.5 atm
1.7 atm
173
Which of the following is NOT and oxyacid
HCLO2
H2SO4
H2O2
HCLO4
174
process by which molecules of gas randomly encounter and pass through small hole in a container
effusion
osmosis
distillation
diffusion
175
Compound's empirical formula - CH₃. If the formula mass- 30 amu, what's the molecular formula?
C3H9
CH3
CH4
C₂H₆
176
Which of the following statements about ionic crystals is not correct?
consist of molecules held together by intermolecular forces.
their ions can be monatomic or polyatomic
the strong binding forces between +/- give them properties
their structure consists of +/- ions arranged in reg pattern
177
which is a formula equation for the formation of carbon dioxide from carbon oxygen?
C + O2 → CO2
CO2→ C + O2
2C + O→CO2
Carbon plus oxygen yeilds carbon
178
An electron-pair donor is a
Arrhenius acid
Brønsted-Lowry acid
Brønsted-Lowry base
Lewis Base
179
What is the oxidation number of a pure element?
8
-1
+1
0
180
Process by which particles escape the surface of a non boiling liquid and enter the gas state
aeration
surface tension
sublimation
evaporation
181
What is the oxidation number of hydrogen in compounds containing metals?
0
+1
the charge on the metal ion
-1
182
The law of combining volumes applies only to gas volumes
measured at STP
that equal 22.4 L
that equal 1L
measured at constant temperature and pressure
183
A formula that shows the simplest whole number ratio of the atoms in a compound
ideal formula
empirical formula
Molecular formula
experimental formula
184
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
percentage yield
mole ratio
excess yield
Avogadro yield
185
For Pb(NO
3
)
2
+2KI→PbI
2
+2KNO
3
, how many mol PbI
2
are made from 300. g of 2KI and excess Pb(NO
3
)
2
?
11.0 mol
1.81 mol
0.904 mol
3.61 mol
186
two gasses w/ unequal molar mass injected into opposite ends of a tube they should begin to mix
exactly in the middle
in approximately five minutes
closer to the end that holds the lighter gas
closer to the end that holds the heavier gas
187
In the reaction N
2
+ 2O
2
→ 2NO
2
what is the volume ratio of N
2
to NO
2
?
2:1
1:2
2:5
1:1
188
The reaction 2HgO(s)→2Hg(l) + O
2
(g) is a(n)
ionic reaction
decomposition reaction
single-replacement reaction
synthesis reaction
189
Gas A has molar mass ≥ gas B & samples of each gas at same T and P = #'s of molecules, then
their volumes are proportional to their molar masses
the volume of gas B is greater than that of gas A
. the volume of gas A is greater than that of gas B
the volumes of gas A and gas B are equal
190
When does the concentration of vapor decrease?
when the liquid phase is warmed
when the temperature remains constant
when the rate of condensation decreases
When the rate of condensation exceeds rate of evaporation
191
To determine the limiting reactant in a reaction with known masses of A&B, first calculate
the masses of all products
the mass of 100 mol of A and B
the bond energies of A snd B
the number of moles of B & number of moles of A available
192
In the equation HCl(g) + H2O(l) →H3O+(aq) + Cl-(aq), which species is a Brønsted-Lowry acid?
H2O
none of the above
CL-
HCl
193
For reactants or products that are gases, the coefficients in the chemical equation indicate
molar volume
volume
density
the number of grams of each substance
194
What is molarity of an HCl solution if 125 mL is neutralized by 76.0 mL of 1.22 M KOH?
0.455 M
0.371 M
0.617 M
0.742 M
195
What is the pH of a solution whose hydronium ion concentration is 5.03 x 10
-1
M
1.542
0.2984
5.031
0.5133
196
Name the compound SO
3
silver trioxide
sulfur trioxide
sodium trioxide
selenium trioxide
197
which coefficients correctly balance the formula equation NH₄NO₂(
s
) = N₂(
g
) + H₂O(
l
)?
1,2,2
2,1,1
1,1,2
2,2,2
198
A water solution whose ph is 4
All that stuff
Is always neutral
Always Basic
Always Acidic
199
Which of the following is not correct about crystalline solids?
they can maintain a definite shape without a container
They are geometrically irregular
they can exist as single crystals
their particles are held in relatively fixed positions
200
Name the compound CCl
4
using the Stock system.
carbon tetrachloride
nitrogen oxide(II)
carbon(IV) chloride
carbon chloride
201
Two gases have the same T by different P. The kinetic-molecular theory does not predict that
low-pressure gas travels farther before they collide
molecules in both gasses have same average kinetic energies
both gases have the same densities.
all collisions of the molecules are elastic
202
What is the sum of the atomic masses of all the atoms in a formula for a compound?
atomic mass
formula mass
actual mass
Molecular mass
203
In an acid-base titration the primary standard
Is always a highly pure acid
Is neither a highly pure base or acid
Is either a highly pure acid or a highly pure base.
Is always a highly pure base
204
In the reaction represented by the equation HSO
4
+H
2
O=H
3
O
+
+SO
2
-4
acts as a(n)
Acid
Base
Spectator Species
Salt
205
Why does a can collapse when a vacuum pump removes air from the can?
The atmosphere exerts pressure on inside of can & crushes it
the inside and outside forces balance out and crush the can
the vacuum pump creates a force that crushes the can
Unbalanced outside force from atmosph pressure crushes it
206
Which instrument measures the pressure of an enclosed gas?
barometer
manometer
torrometer
vacuum pump
207
Compared with a crystalline solid, the particles in an amorphous solid...
Occur in a random pattern
consists of molecular sheets
occur in a definite, three dimensional arrangement
have a more complex unit cell
208
Cl
2
+2KBr→2KCl + Br
2
calculate %yield if 200g Cl react w/ KBr in excess to produce 410.0g Br
2
73.4%
91.0%
98.9%
82.1%
209
According to the kinetic-molecular theory, which is the most difference between gas and liquids
the type of collision that occurs between particles
the distance between the particles
the shapes of the particles
the mass of each particle
210
What is the maximum possible amount of product obtained in a chemical reaction?
theoretical yield
mole ratio
actual yield
percentage yield
211
According to the kinetic-molecular theory, particles of matter are in motion in
the mass of particles
Solids, liquids, and gases
gasses and liquids
gasses only
212
In most chemical reactions the amount of product obtained is
less than the theoretical yield
more than the theoretical yield
more than the percentage yield
equal to the theoretical yield
213
In the reaction represented by the equation Ag+(aq) + 2NH
3
(aq) ® [Ag(NH
3
)
2
]+(aq), Ag+ is a
none of the above
Traditional acid base reaction
Lewis acid-base reaction
Brønsted-Lowry acid-base reaction
214
In wA + xB --> yC + zD, the number of moles to A to the number of moles of C would be a(n)
mole ratio
mass ratio
energy proportion
electron ratio
215
Name the compound N
2
O
3
dinitrogen trioxide
nitrogen trioxide
nitric oxide
dinitrogen oxide
216
The equilibrium vapor pressure of water is
inversely proportional to the temperature
constant at all temperatures
specific for any given temperature
unrelated to temerature
217
Fe
3
O
4
+ Al → Al
2
O
3
+ Fe is correctly balanced the coefficient of Fe is number
9
3
7
2
218
if the rate of evaporation from the surface of a liquid exceeds the rate of condensation
concentration of the vapor is increasing
the system is in equilibrium
the liquid is boiling
energy of heat is no longer available
219
Which of the following causes particles in a liquid to escape into a gas state?
surface temperature
a freezing temperature
High kinetic energy
the combining of liquids
220
Which equation is NOT balanced?
H2 + H2 + O2→H2O + H2O
2H2 + O2→H2O
2H2 + O2→2H2O
4H2 + 2O2 → 4H2O
221
In the reaction represented by the equation H
2
SO
4
+ H
2
O = H
3
O
+
+ HSO
4
-
, the ion HSO4- acts a(n)
Salt
Spectator Species
Acid
Base
222
The ph of an acidic solution is
Greater than 7
Greater than 14
Less than 7
Less than 0
223
magnesium hydroxide decomposes to yield magnesium oxide and
water
oxygen
hydrogen
salt
224
the replacement of bromine by chlorine in salt is an ex of a single displacement reaction by
water
halogens
sodium
electrolysis
225
In the equation represented by the equation, Ni
2
+ + nH
2
O → [Ni(H
2
O)n]
2+
, water (H
2
O) is a
Brønsted-Lowry base
Lewis base
Brønsted-Lowry acid
Lewis acid
226
If the temperature of a fixed quantity and volume of gas changes, what also changes?
formula
mass
density
pressure
227
An amphoteric species is one that reacts as a(n)
None of the above
Base only
acid or base
Acid only
228
At pressures greater than 1 atm, water will boil at
100oC
a temperature higher than 100 degrees celsius
a temperature lower than 100 degrees celsius
4oC
229
A salt is not
n ionic compound composed of an anion from an acid.
a product of neutralization.
an ionic compound composed of a metal cation from a base
a proton donor.
230
What is the mass of 0.240 mol glucose, C₆H₁₂O₆?
43.2 g
750.0 g
180.16 g
24.0 g
231
Glycerol boils at a slightly ↑ temp than H
2
O. This reveals that glycerol's attractive forces
weaker than those of water
nonexistent
stronger than those of water
the same as those of water
232
What is the formula for Aluminum sulfate?
Al(SO4)3
AL2SO4
AlSO4
Al2(SO4)3
233
Which of the following is amphoteric
H+
H2O
H3O+
O2-
234
In the equation 2Al(s) + 3Fe(NO
3
)
2
(aq) →3Fe(s) + 2Al(NO
3
)
3
(aq), iron has been replaced by
nitrogen
water
nitrate
aluminum
235
Which is an example of effusion?
the aroma of a cooling pie spreading across a room
oxygen and gasoline fumes mixing in an automobile carburetor
helium dispersing into a room after a balloon pops
air slowly escaping from a pinhole in a tire
236
Which of the following is chlorous acid
HCLO4
HCLO2
HCLO
HCLO3
237
T is constant, V and P are original vol and press, V' & P' is new, express new Boyle's law
V= VP'/P
VP=V'P'
P'V=V'P
VV'=PP'
238
What is the formula for sulfur dichloride?
S2Cl
SCl2
SCl
S2Cl2
239
type of crystal consists of + metal cations... by valence electrons donated by the metal atoms?
covalent molecular
ionic
metallic
covalent network
240
A real gas...
consists of particles that do not occupy space
Does not obey all of assumptions of kinetic-molecular theory
cannot be condensed
cannot be produced in scientific laboratories
241
What is the formula mass of (NH
4
)
2
SO
4
132.16 amu
118.34 amu
128.06 amu
114.09 amu
242
The substances produced when KOH (aq) neutralizes HCl (aq) are
H20 and KCl.
HCLO and KH
KH2O+ and Cl-
H3O+ and KCL
243
Pure water contains
hydroxide ions only
hydronium ions only
water molecules only
water molecules, hydronium ions, and hydroxide ions
244
What is the formula mass of magnesium chloride, MgCl
2
?
46 amu
106.35 amu
95.21 amu
59.76 amu
245
The compressibility of a liquid is generally...
equal to that of a gas
less than that of a gas
more than that of a gas
zero
246
What acid is found in vinegar
hydrochloric acid
nitric acid
phosphoric acid
acetic acid
247
At STP the standard molar volume of a gas of known volume can be used to calculate the
gram-molecular weight
rate of diffusion
gram-molecular volume
number of moles of gas
248
group 1 metals react with water to produce metal hydroxides and
hydrogen
metal hydroxides
hydrochloric acid
oxygen
249
Aqueous solutions of bases
carry electricity
cannot be prepared
contain only two different elements
have very high boiling points
250
If 0.50 mol of Na⁺ combines with 0.500 mol of Cl⁻ to form NaCl, how many formula units of NaCl?
3.01 x 1023
1
6.02 x 1023
6.02 x 1024
