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Which of the following statements concerning structural isomers is/are correct?
1/ Structural isomers have the same elemental composition, but the atoms are linked in
different ways.
2/ Structural isomers have identical physical properties, but different chemical
properties.
3/ Structural isomers have identical structures, but contain different isotopes of the
same elements.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
For which of the following transitions would a hydrogen atom emit the lowest energy
photon?
A.n = 4 to n = 5
B.n = 5 to n = 2
C.n = 4 to n = 3
D.n = 3 to n = 1
E.n = 3 to n = 2
Which of the following substances is never a Brnsted-Lowry acid in an aqueous
solution?
A.sodium dihydrogen phosphate, NaH2PO4(s)
B.sodium acetate, NaCH3CO2(s)
C.ammonium nitrate, NH4NO3(s)
D.hydrogen bromide, HCl(g)
E.sodium bicarbonate, NaHCO3(s)
What is the distance, in atomic radii, along any edge of a body-centered unit cell?
A.
B.2 r
C.4 r
D.
E.r
Ammonia, NH3, is used as a refrigerant. At its boiling point of "33 C, the standard
enthalpy of vaporization of ammonia is 23.3 kJ/mol. How much heat is released when
50.0 g of ammonia is condensed at "33 C?
A."0.466 kJ
B."7.94 kJ
C."36.6 kJ
D."68.4 kJ
E."1.17 103 kJ
Given the following equilibria,
Ni2+(aq) + 2 OH"(aq) Ni(OH)2(s) K1 = 1.8 1015
Ni2+(aq) + 4 CN"(aq) Ni(CN)4
2"(aq) K2 = 2.0 1031
determine the equilibrium constant, Kc, for the following reaction.
Ni(OH)2(s) + 4 CN"(aq) Ni(CN)4
2"(aq) + 2 OH"(aq)
A.2.8 10"47
B.9.0 10"17
C.1.8 1015
D.1.1 1016
E.3.6 1046
Which of the following ions have the same ground state electron configuration: S2",
N3", Mg2+, and Br"?
A.N3" and Mg2+
B.S2", N3", and Br"
C.S2" and Br"
D.Mg2+ and Br"
E.S2", N3", Mg2+, and Br"
The conjugate base of HPO4
2" is ____.
A.OH"
B.PO4
3"
C.H2PO4
"
D.H2O
E.H3O+
Metals react with oxygen gas to produce oxides with the general formula MxOy. Write a
balanced chemical equation for the reaction of titanium with oxygen to yield
titanium(IV) oxide.
A.4 Ti(s) + O2(g) 2 Ti2O(s)
B.Ti(s) + O2(g) TiO2(s)
C.2 Ti(s) + O2(g) 2 TiO(s)
D.Ti(s) + O(g) TiO(s)
E.8 Ti(s) + O2(g) 2 Ti4O(s)
For the reaction A B, the rate law is
.
What are the units of the rate constant where time is measured in seconds?
A.
B.
C.
D.
E.
What is the name of the following compound?
A.3-methyl-2-isopropylacetylene
B.cis-4-methylhexyne
C.4-methyl-2-hexyne
D.1-methy-2-ethyl-4-butyne
E.trans-3-methyl-4-hexyne
One statement of the first law of thermodynamics is that
A.the amount of work done on a system is dependent of the pathway.
B.the total work done on a system must equal the heat absorbed by the system.
C.the total work done on a system is equal in magnitude, but opposite in sign of the heat
absorbed by the system.
D.the total energy change for a system is equal to the sum of the heat transferred to or
from the system and the work done by or on the system.
E.in any chemical process the heat flow must equal the change in enthalpy.
According to the effective atomic number rule, Mo(0) should coordinate to ____
carbonyl ligands.
A.4
B.5
C.6
D.7
E.8
What is the classification of the molecule below?
A.polymer
B.fatty acid
C.saccharide
D.carbohydrate
E.triglyceride
Diagram 9-1
The molecular orbital diagram below may be used for the following problem(s). For
oxygen and fluorine, the s2p orbital should be lower in energy than the p2p. However,
the diagram will still yield correct bond order and magnetic behavior for these
molecules.
Energy ________ s*2p
________ ________ p*2p
________ s2p
________ ________ p2p
________ s*2s
________ s2s
________ s*1s
________ s1s
Refer to Diagram 9-1. What is the molecular orbital configuration of N2
2+?
A.[core electrons] (s2s)2 (s*2s)2 (p2p)4 (s2p)2 (p*2p)2
B.[core electrons] (s2s)2 (s*2s)2 (p2p)4
C.[core electrons] (s2s)2 (s*2s)2 (p2p)2 (s2p)2
D.[core electrons] (s2s)4 (s*2s)4
E.[core electrons] (s2s)2 (s*2s)2 (p2p)4 (s2p)2 (p*2p)4
Xenon has an enthalpy of vaporization of 12.6 kJ/mol and a vapor pressure of 1.00 atm
at "108.0 C. What is the vapor pressure of xenon at -148.0 C? (R = 8.314 J/Kmol)
A.0.053 atm
B.0.73 atm
C.0.93 atm
D.0.99 atm
E.19 atm
What is the correct cell notation for a voltaic cell based on the reaction below?
Cu2+(aq) + Fe(s) Cu(s) + Fe2+(aq)
A.Cu(s) | Cu2+(aq) || Fe2+(aq) | Fe(s)
B.Fe(s) || Fe2+(aq), Cu2+(aq) | Cu(s)
C.Cu(s) || Cu2+(aq), Fe2+(aq) || Fe(s)
D.Cu(s) | Fe2+(aq) || Cu2+(aq) | Fe(s)
E.Fe(s) | Fe2+(aq) || Cu2+(aq) | Cu(s)
What is the product of the addition of excess F2 to acetylene?
A.1,2-difluoroethane
B.ethylene
C.1,1,2,2-tetrafluoroethane
D.ethane
E.1,1-difluoroethylene
Which of the following statements is/are CORRECT?
1/ Complex ions with the structure [ML2]n are always linear.
2/ Complex ions with the structure [ML6]n are always octahedral.
3/ Complex ions with the structure [ML4]n are always square planar.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.2 and 3
Calculate for the reaction below,
2 AgBr(aq) + 2 Hg(l) 2 Ag(s) + Hg2Br2(s)
given the following standard reduction potentials.
Hg2Br2(s) + 2 e" 2 Hg(l) + 2 Br"(aq) E = +0.140 V
AgBr(aq) + e" Ag(s) + Br"(aq) E = +0.071 V
A."0.211 V
B."0.069 V
C.+1.97 V
D.+0.069 V
E.+0.211 V
How many electrons can be described by the quantum numbers n = 4, = 2, = 0?
A.0
B.1
C.2
D.5
E.10
Use VSEPR theory to predict the electron-pair geometry and the molecular geometry of
boron tribromide, BBr3.
A.The electron-pair geometry is trigonal-pyramidal, the molecular geometry is
trigonal-pyramidal.
B.The electron-pair geometry is trigonal-planar, the molecular geometry is
trigonal-planar.
C.The electron-pair geometry is trigonal-planar, the molecular geometry is bent.
D.The electron-pair geometry is tetrahedral, the molecular geometry is
trigonal-pyramidal.
E.The electron-pair geometry is trigonal-pyramidal, the molecular geometry is t-shaped.
For a reaction, DrH = "208.8 kJ and DrS = "308.2 J/K. At what temperature will DrG =
0.00 kJ?
A.0.68 K
B.677.5 K
C.1476 K
D.6435 K
E.DG is less than 0.00 kJ at any temperature.
Which one of the following is not an SI base unit?
A.liter
B.mole
C.calorie
D.ampere
E.second
How much energy (in kJ) is required to change the temperature of 325 g aluminum
from 32 C to 815 C? The specific heat capacity of aluminum is 0.897 J/gK.
A.238 kJ
B.284 kJ
C.46.3 kJ
D.228 kJ
E.2.16 kJ
Which of the following types of radiation has the greatest quality factor?
A.beta particles
B.alpha particles emitted within the body
C.gamma rays
D.low energy protons
E.low energy neutrons
Write the expression for K for the reaction below.
Al3+(aq) + 4 OH"(aq) Al(OH)4
"(aq)
A.
B.
C.
D.
E.
Determine the heat of evaporation of carbon disulfide,
CS2( ) CS2(g)
given the enthalpies of reaction below.
C(s) + 2 S(s) CS2( ) DrH = +89.4 kJ/mol-rxn
C(s) + 2 S(s) CS2(g) DrH = +116.7 kJ/mol-rxn
A."206.1 kJ
B."27.3 kJ
C.+27.3 kJ
D.+206.1 kJ
E.+1.31 kJ
Metal oxides react with water to produce ____.
A.bases
B.hydrogen gas
C.oxygen gas
D.acids
E.hydronium ions
Rank F, Cl, and Br in order of increasing first ionization energy.
A.F < Cl < Br
B.Cl < F < Br
C.Cl < Br < F
D.Br < F < Cl
E.Br < Cl < F
