15. Which of the following steps appearing in a mechanism would be third order overall? SOCh O So: + Cl: b. a. 2 NO + 0: O 2 NO: 2 N;0 O 2 N; + O: 2 HI O H; + ; с. d.
15. Which of the following steps appearing in a mechanism would be third order overall? SOCh O So: + Cl: b. a. 2 NO + 0: O 2 NO: 2 N;0 O 2 N; + O: 2 HI O H; + ; с. d.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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![15.
overall?
Which of the following steps appearing in a mechanism would be third order
SO Cl: D SO2 + Cl:
a.
b.
2 NO + 02 0 2 NO:
2 N:0 D 2 N: + 0:
c.
d.
2 HI O H; + I
16.
Which of the following statements is true for a zero order reaction?
The rate constant equals zero
The activation energy equals zero
The rate is independent of concentration
The half-life is equal to 0.693/k
None of those
a.
b.
c.
d.
e.
Reaction rates increase with temperature. How many of the statements below
explain the phenomenon?
17.
Molecular velocities increase
The average kinetic energy of the molecules increases
The fraction of high energy molecules increases
Collisions occur more frequently at high temperatures
b. 1
c. 2
d. 3
c. 4
a. 0
In a first order reaction with time measured in seconds and concentration measured
18.
in mol/L, the rate constant can have units of
b. 1/s
c. s mol/L
d. mol/Ls e. none of these
a.s
Consider the following overall reaction. NO: + COO NO + CO:
A proposed mechanism for this overall reaction is
2 NO: O NO + NO,
NO, + CO D NO: + CO2
19.
(slow)
(fast)
If the proposed mechanism is valid. The rate expression for the overall reaction could be
b. k[NO:)
c. k[NO:]
d. k[NO:][CO]
a. k[NO:]
20. The ions Li' and Be" have contrasting second ionization energies:
Li= 7531.2 kJ/m; Be - 1987.4 kJ/m.
A major reason why they differ so much is that
a) Be' has one more neutron in its nucleus than has Li".
b) Lithium has more naturally occurring isotopes than has Be.
c) Be" has one 2s electron remaining and Li" has no 2s electrons.
d) Be" has a lower nuclear charge than has Lit.
e) Li' has one less neutron in its nucleus than has Be".
21. In the expression: (empirical formula). = molecular mass, when x is equal to one
a) the molecular formula is the same as the empirical formula.
b) the molecular mass is greater than the empirical weight.
c) the formula mass is less than the empirical weight.
d) the mass percentage of each element is 50%.
e) none of these.
t is
22. The term X in the correctly balanced equation, B;0, + Mg D X + B, is
a) 2 MgO;
b) 2 Mg(OH):;
c) Mg:O;
d) 3 MgO;
e) Mg O2.
23. How many liters of oxygen at S.T.P. will react when nonane, CoH20, is burned?
The balanced equation has molar coefficients.
a) 14 liters
d) 313.6 liters
b) 156.8 liters
e) 322.4 liters
c) 204.3 liters](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F001a30e7-82ae-4fd9-8c10-f81ad53ce881%2Fcba9b4be-342f-4901-87bf-5601184c921b%2Fhog9gxv_processed.jpeg&w=3840&q=75)
Transcribed Image Text:15.
overall?
Which of the following steps appearing in a mechanism would be third order
SO Cl: D SO2 + Cl:
a.
b.
2 NO + 02 0 2 NO:
2 N:0 D 2 N: + 0:
c.
d.
2 HI O H; + I
16.
Which of the following statements is true for a zero order reaction?
The rate constant equals zero
The activation energy equals zero
The rate is independent of concentration
The half-life is equal to 0.693/k
None of those
a.
b.
c.
d.
e.
Reaction rates increase with temperature. How many of the statements below
explain the phenomenon?
17.
Molecular velocities increase
The average kinetic energy of the molecules increases
The fraction of high energy molecules increases
Collisions occur more frequently at high temperatures
b. 1
c. 2
d. 3
c. 4
a. 0
In a first order reaction with time measured in seconds and concentration measured
18.
in mol/L, the rate constant can have units of
b. 1/s
c. s mol/L
d. mol/Ls e. none of these
a.s
Consider the following overall reaction. NO: + COO NO + CO:
A proposed mechanism for this overall reaction is
2 NO: O NO + NO,
NO, + CO D NO: + CO2
19.
(slow)
(fast)
If the proposed mechanism is valid. The rate expression for the overall reaction could be
b. k[NO:)
c. k[NO:]
d. k[NO:][CO]
a. k[NO:]
20. The ions Li' and Be" have contrasting second ionization energies:
Li= 7531.2 kJ/m; Be - 1987.4 kJ/m.
A major reason why they differ so much is that
a) Be' has one more neutron in its nucleus than has Li".
b) Lithium has more naturally occurring isotopes than has Be.
c) Be" has one 2s electron remaining and Li" has no 2s electrons.
d) Be" has a lower nuclear charge than has Lit.
e) Li' has one less neutron in its nucleus than has Be".
21. In the expression: (empirical formula). = molecular mass, when x is equal to one
a) the molecular formula is the same as the empirical formula.
b) the molecular mass is greater than the empirical weight.
c) the formula mass is less than the empirical weight.
d) the mass percentage of each element is 50%.
e) none of these.
t is
22. The term X in the correctly balanced equation, B;0, + Mg D X + B, is
a) 2 MgO;
b) 2 Mg(OH):;
c) Mg:O;
d) 3 MgO;
e) Mg O2.
23. How many liters of oxygen at S.T.P. will react when nonane, CoH20, is burned?
The balanced equation has molar coefficients.
a) 14 liters
d) 313.6 liters
b) 156.8 liters
e) 322.4 liters
c) 204.3 liters
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