33
Easy Average Difficult Clincher 1 6 11 14 2 7 3 8 12 15 4 9 5 10 13 16
Easy Average Difficult Clincher
1 6 11 14
2 7
3 8 12 15
4 9
5 10 13 16
Answer Main
109876543210END10
Consistent with vanadium being a transition metal,
the name for VSO4 should be
A. vanadium sulfide.
B. vanadium (I) sulfite.
C. vanadium (I) sulfate.
D. vanadium (II) sulfate.
E. vanadium sulfur tetraoxide.
Answer Main
3029282726252423222120191817161514131211109876543210END30
Consider the element with the electron
configuration [Kr]5s24d7. This element is
A. an alkali metal.
B. a transition metal.
C. a nonmetal.
D. an actinide element.
E. a noble gas.
Answer Main
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Which of the following represents an acid-base
neutralization reaction?
A. 2Al(s) + 3H2SO4(aq) Al2(SO4)3(aq) + 3H2(g)
B. SO2(g) + H2O(l) H2SO3(g)
C. LiOH(aq) + HNO3(aq) LiNO3(aq) + H2O(l)
D. 2KBr(aq) + Cl2(g) 2KCl(aq) + Br2(l)
E. CaBr2(aq) + H2SO4(aq) CaSO4(s) + 2HBr(g)
Answer Main
For what order reaction does the half-life
remains constant as the initial concentration
increases?
A. zeroth order
B. first order
C. second order
D. none of them because half-life is always
independent of the initial concentration
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Answer Main
According to the collision theory, all collisions do not lead to
reaction. Which choice gives both reasons why not all
collisions between reactant molecules lead to reaction?
1.The total energy of two colliding molecules is less than
some minimum amount of energy.
2.Molecules cannot react with each other unless a catalyst is
present.
3.Molecules that are improperly oriented during collision will
not react.
4. The temperature is not high enough.
20191817161514131211109876543210END20
Answer Main
Consistent with vanadium being a transition metal,
the name for VSO4 should be
A. vanadium sulfide.
B. vanadium (I) sulfite.
C. vanadium (I) sulfate.
D. vanadium (II) sulfate.
E. vanadium sulfur tetraoxide.
Answer Main
Consider the element with the electron
configuration [Kr]5s24d7. This element is
A. an alkali metal.
B. a transition metal.
C. a nonmetal.
D. an actinide element.
E. a noble gas.
Answer Main
Which of the following represents an acid-base
neutralization reaction?
A. 2Al(s) + 3H2SO4(aq) Al2(SO4)3(aq) + 3H2(g)
B. SO2(g) + H2O(l) H2SO3(g)
C. LiOH(aq) + HNO3(aq) LiNO3(aq) + H2O(l)
D. 2KBr(aq) + Cl2(g) 2KCl(aq) + Br2(l)
E. CaBr2(aq) + H2SO4(aq) CaSO4(s) + 2HBr(g)
Answer Main
For what order reaction does the half-life
remains constant as the initial concentration
increases?
A. zeroth order
B. first order
C. second order
D. none of them because half-life is always
independent of the initial concentration
Answer Main
According to the collision theory, all collisions do not lead to
reaction. Which choice gives both reasons why not all
collisions between reactant molecules lead to reaction?
1.The total energy of two colliding molecules is less than
some minimum amount of energy.
2.Molecules cannot react with each other unless a catalyst is
present.
3.Molecules that are improperly oriented during collision will
not react.
4. The temperature is not high enough.
Answer: 1 and 3
Answer Main
6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END60
A 3.682 g sample of KClO3 is dissolved in
enough water to give 375. mL of solution.
What is the chlorate ion concentration in
this solution?
Answer Main
6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END60
A glass containing 200. g of H2O at 20°C
was placed in a refrigerator. The water
loses 11.7 kJ as it cools to a constant
temperature. What is its new temperature?
The specific heat of water is 4.184 J/g·°C.
Answer Main
6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END60
The reaction C4H10 C2H6 + C2H4 has an
activation energy (Ea) of 350 kJ/mol, and the
Ea of the reverse reaction is 260 kJ/mol.
Estimate H, in kJ/mol, for the reaction as
written above.
Answer Main
For the reaction
BrO3 + 5Br+ 6H+ 3Br2 + 3H2O
at a particular time, [BrO3]/t = 1.5 10-2
M/s. What is [Br]/t at the same instant?
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Answer Main
The appropriate unit for a first-order rate constant is
A. M/s
B. 1/M·s
C. 1/s
D. 1/M2·s
6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END60
Answer Main
A 3.682 g sample of KClO3 is dissolved in
enough water to give 375. mL of solution.
What is the chlorate ion concentration in
this solution?
Ans = 8.01 102 M
Answer Main
A glass containing 200. g of H2O at 20°C
was placed in a refrigerator. The water
loses 11.7 kJ as it cools to a constant
temperature. What is its new temperature?
The specific heat of water is 4.184 J/g·°C.
Answer: 6°C
Answer Main
The reaction C4H10 C2H6 + C2H4 has an
activation energy (Ea) of 350 kJ/mol, and the
Ea of the reverse reaction is 260 kJ/mol.
Estimate H, in kJ/mol, for the reaction as
written above.
Answer: +90 kJ/mol
Answer Main
For the reaction
BrO3 + 5Br+ 6H+ 3Br2 + 3H2O
at a particular time, [BrO3]/t = 1.5 10-2
M/s. What is [Br]/t at the same instant?
Answer: 7.5 102 M/s
Answer Main
The appropriate unit for a first-order rate constant is
A. M/s
B. 1/M·s
C. 1/s
D. 1/M2·s
Answer Main
9089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END90
For the reaction:
C(graphite) + O2(g) CO2(g), H° = 393 kJ/mol
How many grams of C(graphite) must be burned to
release 275 kJ of heat?
Answer Main
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Ammonia reacts with diatomic oxygen to form
nitric oxide and water vapor:
4NH3 + 5O2 4NO + 6H2O
When 1.20 mol NH3 and 1.75 mol O2 are
allowed to react, which is the excess reagent
and by how much?
Answer Main
The isomerization of cyclopropane to propene
follows first-order kinetics. At 700 K, the rate
constant for this reaction is 6.2 104 min 1. How
many minutes are required for 10.0% of a sample of
cyclopropane to isomerize to propene?
C3H6 (cyclopropane) C3H6 (propene)
9089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END90
Answer Main
For the reaction:
C(graphite) + O2(g) CO2(g), H° = 393 kJ/mol
How many grams of C(graphite) must be burned to
release 275 kJ of heat?
Answer: 8.40 g
Answer Main
Ammonia reacts with diatomic oxygen to form
nitric oxide and water vapor:
4NH3 + 5O2 4NO + 6H2O
When 1.20 mol NH3 and 1.75 mol O2 are
allowed to react, which is the excess reagent
and by how much?
Answer: 0.25 mol O2
Answer Main
The isomerization of cyclopropane to propene
follows first-order kinetics. At 700 K, the rate
constant for this reaction is 6.2 104 min 1. How
many minutes are required for 10.0% of a sample of
cyclopropane to isomerize to propene?
C3H6 (cyclopropane) C3H6 (propene)
Answer: 170 min
Answer Main
1801791781771761751741731721711701691681671661651641631621611601591581571561551541531521511501491481471461451441431421411401391381371361351341331321311301291281271261251241231221211201191181171161151141131121111101091081071061051041031021011009998979695949392919089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END180
Given:
2Al(s) + (3/2)O2(g) Al2O3(s), H°f = 1,670 kJ/mol
Determine H for the reaction:
2Al2O3(s) 4Al(s) + 3O2(g)
Answer Main
The isomerization of cyclopropane follows
first order kinetics. The rate constant at 700
K is 6.20 104 min1, and the rate constant
at 760 K is 0.024 min 1. Calculate the
activation energy for this reaction.
1801791781771761751741731721711701691681671661651641631621611601591581571561551541531521511501491481471461451441431421411401391381371361351341331321311301291281271261251241231221211201191181171161151141131121111101091081071061051041031021011009998979695949392919089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END180
Answer Main
Given that Ea for a certain biological
reaction is 48 kJ/mol and that the rate
constant is 2.5 102 s1 at 15C, what
is the rate constant at 37C?
1801791781771761751741731721711701691681671661651641631621611601591581571561551541531521511501491481471461451441431421411401391381371361351341331321311301291281271261251241231221211201191181171161151141131121111101091081071061051041031021011009998979695949392919089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210END180
Answer Main
Given:
2Al(s) + (3/2)O2(g) Al2O3(s), H°f = 1,670 kJ/mol
Determine H for the reaction:
2Al2O3(s) 4Al(s) + 3O2(g)
Answer: 3,340 kJ/mol
Answer Main
The isomerization of cyclopropane follows
first order kinetics. The rate constant at 700
K is 6.20 104 min1, and the rate constant
at 760 K is 0.024 min 1. Calculate the
activation energy for this reaction.
Answer: 270 kJ/mol
Answer Main
Given that Ea for a certain biological
reaction is 48 kJ/mol and that the rate
constant is 2.5 102 s1 at 15C, what
is the rate constant at 37C?
Answer: 0.104 s1
