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Which of the following nonpolar molecules has the highest boiling point?
A.N2
B.C2H4
C.F2
D.O2
E.CS2
What particle(s) are produced in the following reaction?
A.
B.
C.
D.
E.
All of the following molecules or ions can act as polydentate ligands EXCEPT ____.
A.phenanthroline; C12H8N2
B.acetylacetate ion; CH3COCHCOCH3
"
C.oxalate ion; C2O4
2"
D.ethylenediamine; H2NCH2CH2NH2
E.dimethylamine; (CH3)2NH2
Write the expression for Kp for the reaction below.
MgCO3(s) MgO(s) + CO2(g)
A.
B.
C.
D.
E.
The compound P4S3 is used in matches. It reacts with oxygen to produce P4O10 and
SO2. The unbalanced chemical equation is shown below.
P4S3(s) + O2(g) P4O10(s) + SO2(g)
What mass of SO2 is produced from the combustion of 0.401 g P4S3?
A.0.134 g
B.1.20 g
C.0.0389 g
D.0.117 g
E.0.350 g
What is the name of the product of the reaction that occurs when a mixture of methanol
and propionic acid is heated in the presence of acid?
A.methyl propylether
B.2-propanone
C.propyl methanoate
D.2-methylpropanal
E.methyl propanoate
Arrange H2S, H2Se, and H2Te in order from lowest to highest boiling point.
A.H2Te < H2Se < H2S
B.H2S < H2Se < H2Te
C.H2S < H2Te < H2Se
D.H2Se < H2Te < H2S
E.H2Te < H2S < H2Se
A balloon is filled with He gas to a volume of 2.10 L at 35 C. The balloon is placed in
liquid nitrogen until its temperature reaches "196 C. Assuming the pressure remains
constant, what is the volume of the cooled balloon?
A.-0.375 L
B.0.375 L
C.0.525 L
D.0.00909 L
E.8.40 L
Which one of the following statements concerning isomers is INCORRECT?
A.Pairs of nonsuperimposable molecules are called enantiomers.
B.Enantiomers have identical melting and boiling points.
C.Molecules with two or more geometric isomers are termed chiral pairs.
D.Optical isomers rotate polarized light in opposite directions.
E.Structural isomers have the same composition, but the atoms are linked in different
ways.
Which of the following statements concerning boron compounds is INCORRECT?
A.More than 20 neutral boron hydrides (having formulas BxHy) are known to exist.
B.The two boron atoms in B2H6 are connected by 3-center 2-electron B-H-B bridges.
C.Borax, Na2B4O710 H2O, is used as a low-melting flux in metallurgy.
D.Sodium borohydride, NaBH4, is a reducing agent used in organic chemistry.
E.Diborane, B2H6, is the powerful rocket fuel that is used to launch the space shuttle.
Which of the following elements is a d-block element?
A.Kr
B.Ba
C.Hg
D.Pb
E.Nd
At the high temperatures necessary for fusion, matter exists as a plasma, which is
A.a liquid form of a radioactive element.
B.a gaseous cloud of electrons and positrons.
C.a mixture of unbound nuclei and electrons.
D.an equal mixture of matter and anti-matter.
E.a dense solid composed of neutrons.
How many sigma (s) bonds and pi (p) bonds are in propene, CH2CHCH3?
A.six s, two p
B.seven s, one p
C.seven s, two p
D.eight s, zero p
E.eight s, one p
Sulfuryl chloride decomposes to sulfur dioxide and chlorine.
SO2Cl2(g) SO2(g) + Cl2(g)
Kc is 0.045 at 648 K. If an initial concentration of 0.075 M SO2Cl2 is allowed to
equilibrate, what is the equilibrium concentration of Cl2?
A.0.0034 M
B.0.030 M
C.0.040 M
D.0.058 M
E.0.075 M
Calculate the equilibrium constant for the reaction below at 25 C,
Co(s) + 2 Cr3+(aq) Co2+(aq) + 2 Cr2+(aq)
given the following thermodynamic information.
Co2+(aq) + 2 e" Co(s) E = "0.28 V
Cr3+(aq) + e" Cr2+(aq) E = "0.41 V
A.4.0 10"5
B.2.5 104
C.1.0 105
D.1.2 105
E.1.3 105
A green laser pointer emits light at 532.0 nm. What is the frequency of this radiation?
A.1.594 102 s"1
B.1.775 10"15 s"1
C.1.595 1011 s"1
D.5.635 1014 s"1
E.6.270 10"12 s"1
Given the following two half-reactions, write the overall balanced reaction in the
direction in which it is spontaneous and calculate the standard cell potential.
Ga3+(aq) + 3 e" Ga(s) E = "0.53 V
Sn4+(aq) + 2 e" Sn2+(aq) E = +0.15 V
A.2 Ga3+(aq) + 3 Sn2+(aq) 2 Ga(s) + 3 Sn4+(aq) = +0.68 V
B.3 Ga3+(aq) + 2 Sn2+(aq) 3 Ga(s) + 2 Sn4+(aq) = "1.89 V
C.2 Ga(s) + 3 Sn4+(aq) 2 Ga3+(aq) + 3 Sn2+(aq) = +0.68 V
D.3 Ga(s) + 2 Sn4+(aq) 3 Ga3+(aq) + 2 Sn2+(aq) = +0.38 V
E.2 Ga(s) + 3 Sn4+(aq) 2 Ga3+(aq) + 3 Sn2+(aq) = +1.89 V
Which of the following reactions is an example of positron emission?
A.
B.
C.
D.
E.
In what way is cryolite (Na3AlF6) used in the production of aluminum?
A.Cryolite is a catalyst, it increases the rate of aluminum reduction.
B.Cryolite-bauxite mixtures melt at lower temperatures than pure bauxite.
C.Cryolite makes aluminum more corrosion resistant.
D.Cryolite is reduced to aluminum at the cathode.
E.Cryolite is oxidized to F2(g) at the anode.
Which of the following statements is INCORRECT?
A.Carbon is classified as a nonmetal.
B.Silicon is classified as a metalloid.
C.Germanium is classified as a metal.
D.Tin is classified as a metal.
E.Lead is classified as a metal.
What is the H3O+ concentration in 0.50 M HOCl(aq)? (Ka of HOCl = 3.5 10"8)
A.1.8 10"8 M
B.3.5 10"8 M
C.2.9 10"7 M
D.1.3 10"4 M
E.5.0 10"1 M
The density of H2 gas in a rigid container is 0.117 g/L at 55 C. What is the pressure of
hydrogen in the flask if it is heated to 125 C? (R = 0.08206 Latm/molK)
A.0.142 atm
B.0.194 atm
C.1.56 atm
D.1.90 atm
E.3.55 atm
Putrescine and cadaverine are two compounds associated with decaying flesh or bad
breath. These compounds belong to a class of molecules called ____.
A.ethers
B.amines
C.ketones
D.esters
E.carboxylic acids
Soft drink bottles are made of polyethylene terephthalate (PET), a polymer composed
of carbon, hydrogen, and oxygen. If 1.9022 g PET is burned in oxygen it produces
0.6585 g H2O and 4.0216 g CO2. What is the empirical formula of PET?
A.CHO
B.CH7O5
C.C5H7O
D.C8H10O
E.C10H8O5
Which molecule or ion does NOT act as a ligand?
A.H2O
B.NH4
+
C.Cl"
D.C2O4
2"
E.CN"
Light with a wavelength of 1.5 10"8 m is in the x-ray region of the electromagnetic
spectrum. What is the wavelength of this light in picometers?
A.1.5 10"80 pm
B.1.5 10"20 pm
C.1.5 10"1 pm
D.1.5 104 pm
E.1.5 107 pm
A buffer is composed of 0.400 mol H2PO4
" and 0.400 mol HPO4
2" diluted with water to
a volume of 1.00 L. The pH of the buffer is 7.210. How many moles of HCl must be
added to decrease the pH to 6.210?
A.0.200 mol
B.0.327 mol
C.0.360 mol
D.0.400 mol
E.3.60 mol
What is the oxidation state of iron in K4[Fe(CN)6]?
A."1
B.+1
C.+2
D.+3
E.+4
What is the product of the addition of F2 to 1-butene?
A.1-fluorobutene
B.1,1-difluorobutane
C.2,2-difluorobutane
D.1,2-difluorobutane
E.1,1,2,2-tetrafluorobutane
What is the distance, in atomic radii, across a diagonal face of a face-centered unit cell?
A.
B.2 r
C.4 r
D.
E.r
Determine DrH for the following reaction,
2 NH3(g) + 5/2 O2(g) 2 NO(g) + 3 H2O(g)
given the thermochemical equations below.
N2(g) + O2(g) 2 NO(g) DrH = +180.8 kJ/mol-rxn
N2(g) + 3 H2(g) 2 NH3(g) DrH = "91.8 kJ/mol-rxn
2 H2(g) + O2(g) 2 H2O(g) DrH = "483.6 kJ/mol-rxn
A."1178.2 kJ/mol-rxn
B."452.8 kJ/mol-rxn
C."394.6 kJ/mol-rxn
D."211.0 kJ/mol-rxn
E.+1178.2 kJ/mol-rxn
What are the spectator ions in the reaction between aqueous nitric acid and ammonia?
A.H+ only
B.NO3
" only
C.H+ and NH4
+
D.NO3
" and NH4
+
E.H+, NO3
", and NH4
+
A 25.00 mL sample of NaOH is titrated with 26.14 mL of 0.1750 M HCl(aq). What is
the concentration of the NaOH solution?
A.1.995 10-4 M
B.0.09149 M
C.0.1830 M
D.0.1674 M
E.0.08945 M
Given the initial rate data for the reaction A + B C, determine the rate expression for the
reaction.
[A], M [B], M D[C]/Dt (initial) M/s
0344 0.272 6.10 10"2
A.
B.
C.
D.
E.
________ rule states that the most stable arrangement of electrons is that which
contains the maximum number of unpaired electrons, all with the same spin direction.
The ________ of an elementary step is defined as the number of reactant molecules that
come together in the reaction.
Elementary steps in a reaction mechanism often include reaction ________. These
(usually) short-lived species, which are at one point produced and then later consumed,
do not appear in the overall chemical reaction.
Which of the following statements concerning ionic compounds is/are correct?
1.As ion charges increase, the attraction between oppositely charged ions increases.
2.Although not electrically conductive like metals, ionic compounds are malleable.
3.Positive and negative ions are attracted to each other by electrostatic forces.
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3
At what temperature (in kelvin units) is the entropy of a pure crystal 0.0 J/K.
The primary product of the reaction of potassium and oxygen is ________. This
compound is used in oxygen generators.
Explain the difference between 1 rad and 1 rem of radiation.
.
The ________ quantum number is given the symbol . This quantum number is
related to the orientation in space of an orbital.
The size of an electron orbital is often chosen to be the distance within which 90% of
the electron density is found. Why is the orbital radius not chosen to be the distance
within which 100% of the electron density is found?
If an egg's shell is carefully dissolved using an acid, the egg white and yolk will remain
intact inside a membrane. If the egg is then placed in distilled water, it will slowly
expand until it bursts. Why?
Which of the following statements concerning atomic structure is/are correct?
1.Neutrons and electrons are found in space as a cloud around the nucleus.
2.The nucleus contains all the positive charge of an atom.
3.Electrons surround the nucleus and account for the majority of an atom's volume.
A.1 only
B.2 only
C.3 only
D.2 and 3
E.1, 2, and 3
In which ionic compound, NaBr or KBr, is the force of attraction between anions and
cations stronger?
