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For which one of the following elements is the second ionization energy over ten times
larger than its first ionization energy?
A.B
B.N
C.Li
D.Ne
E.Cu
What nucleus is produced if thorium-225 decays by electron capture?
A.
B.
C.
D.
E.
Ozone is formed from oxygen.
3 O2(g) 2 O3(g)
Calculate the value of Kp, given that Kc = 2.5 10"29 at 298 K. (R = 0.08206 Latm/molK)
A.1.0 10"30
B.2.1 10"30
C.2.5 10"29
D.3.3 10"28
E.6.1 10"28
What mass of solid NaCH3CO2 (molar mass = 82.0 g/mol) should be added to 1.0 L of
0.50 M CH3CO2H to make a buffer with a pH of 7.21? (pKa of CH3CO2H = 7.21)
A.0.0 g
B.1.9 g
C.41 g
D.71 g
E.1.6 102 g
Pure oxygen can be produced by the catalyzed decomposition of potassium chlorate.
Write a balanced chemical equation for this reaction.
A.KClO3(s) KClO(s) + O2(g)
B.2 KClO3(s) 2 K(s) + Cl2(g) + 3 O2(g)
C.2 KClO3(s) 2 KCl(s) + 3 O2(g)
D.2 KClO3(s) 2 KClO2(s) + O2(g)
E.KClO3(s) K(s) + ClO(g) + O2(g)
Based on electron geometries, which of the following molecules has the smallest bond
angle between any two adjacent hydrogen atoms?
A.CH4
B.H2O
C.BH3
D.PH3
E.SF6
The complete combustion of 0.20 moles of propane, C3H8, will
A.consume 0.20 mol O2 and produce 0.20 mol CO2.
B.consume 0.20 mol O2 and produce 0.40 mol CO2.
C.consume 1.0 mol O2 and produce 0.60 mol CO2.
D.consume 1.0 mol O2 and produce 3.0 mol CO2.
E.consume 1.0 mol O2 and produce 0.80 mol CO2.
Write the expression for K for the reaction of hydrofluoric acid with water.
HF(aq) + H2O( ) F"(aq) + H3O+(aq)
A.
B.
C.
D.
E.
Which of the following compounds will produce a basic solution when dissolved in
water?
A.CaO
B.NaHSO4
C.CO2
D.SO2
E.KCl
Write a balanced chemical equation for the following reaction in a basic solution.
ClO"(aq) + Cr(OH)3(s) Cl"(aq) + CrO4
2"(aq)
A.3 ClO"(aq) + 2 Cr(OH)3(s) + 4 OH"(aq) 3 Cl"(aq) + 2 CrO4
2"(aq) + 5 H2O( )
B.ClO"(aq) + Cr(OH)3(s) + 3 OH"(aq) Cl"(aq) + CrO4
2"(aq) + 3 H2O( )
C.2 ClO"(aq) + 3 Cr(OH)3(s) + 3 OH"(aq) 2 Cl"(aq) + 3 CrO4
2"(aq) + 6 H2O( )
D.4 ClO"(aq) + Cr(OH)3(s) + 4 OH"(aq) Cl"(aq) + CrO4
2"(aq) + 6 H2O( )
E.ClO"(aq) + Cr(OH)3(s) Cl"(aq) + CrO4
2"(aq) + 3 H+(aq)
Which of the following nitrogen oxides are free radicals: NO, N2O, NO2, and/or N2O3?
A.NO and N2O
B.N2O and NO2
C.NO2 and N2O3
D.NO and NO2
E.N2O and N2O3
What volume of 3.0 M HNO3(aq) must be diluted to make 4.0 L of 0.20 M HNO3(aq)?
A.6.0 L
B.0.15 L
C.0.20 L
D.0.27 L
E.2.4 L
Which of the following statements concerning valence bond (VB) theory is/are
CORRECT?
1/ VB theory can describe molecular bonding in excited states.
2/ VB theory predicts that electrons are localized between pairs of atoms.
3/ VB theory correctly predicts the phase (g, , or s) of a molecule as a function of
temperature.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
Assuming ideal behavior, which of the following aqueous solutions should have the
highest boiling point?
A.1.00 m LiBr
B.0.75 m K2SO4
C.0.50 m Ca(NO3)2
D.0.75 m NaCl
E.1.25 m C6H12O6
Use Lewis structures to predict the bond order for a nitrogen-oxygen bond in nitrite ion,
NO2
".
A.1/2
B.1
C.4/3
D.3/2
E.2
The combustion of 0.0272 mole of a hydrocarbon produces 1.9609 g H2O and 3.5927 g
CO2. What is the molar mass of the hydrocarbon?
A.16.0 g/mol
B.30.1 g/mol
C.44.1 g/mol
D.72.2 g/mol
E.92.1 g/mol
Which of the following factors are likely to affect the rate of a chemical reaction?
1/ the presence of a catalyst
2/ the temperature of the reactants
3/ the physical state (solid, liquid, or gas) of the reactants
A.1 only
B.2 only
C.3 only
D.1 and 3
E.1, 2, and 3
What is the number of unpaired electrons in an octahedral, high-spin Co(III) complex?
A.1
B.2
C.3
D.4
E.5
What are the possible geometries of a metal complex with a coordination number of 4?
1/ square planar
2/ tetrahedral
3/ octahedral
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
The ____ of a photon of light is ____ proportional to its frequency and ____
proportional to its wavelength.
A.energy, directly, inversely
B.energy, inversely, directly
C.velocity, directly, inversely
D.intensity, inversely, directly
E.amplitude, directly, inversely
Express 2.030 101 in standard notation.
A.0.2030
B.2.030
C.2.03
D.20.3
E.20.30
In the following reaction,
HCO3
"(aq) + H2O( ) CO3
2"(aq) + H3O+(aq)
A.H3O+ is an acid and HCO3
" is its conjugate base.
B.HCO3
" is an acid and CO3
2" is its conjugate base.
C.HCO3
" is an acid and H2O is its conjugate base.
D.H2O is an acid and CO3
2" is its conjugate base.
E.H3O+ is an acid and CO3
2" is its conjugate base.
Which of the following statements is/are CORRECT?
1/ If the intermolecular forces in a liquid decrease, the normal boiling point of the liquid
decreases.
2/ If the temperature of a liquid increases, the equilibrium vapor pressure increases.
3/ If the surface area of a liquid increases, the equilibrium vapor pressure of the liquid
increases.
A.1 only
B.2 only
C.3 only
D.1 and 2
E.1, 2, and 3
What is the correct formula for an ionic compound that contains barium ions and
carbonate ions?
A.BaCO3
B.Ba(HCO3)2
C.Ba2CO3
D.Ba2C
E.Ba(CO3)2
Which one of the following hydrocarbons is aromatic?
A.
B.
C.
D.
E.
Which element has the following ground state electron configuration?
A.In
B.Y
C.Nb
D.Tl
E.Ga
How many moles of sodium bromide can be produced from the reaction of 1.03 moles
of sodium with 0.650 moles of bromine gas?
2 Na(s) + Br2(g) 2 NaBr(s)
A.0.650 mol
B.1.03 mol
C.1.30 mol
D.2.06 mol
E.0.515 mol
An aqueous solution with a pH of 10.60 is diluted from 1.0 L to 2.0 L. What is the pH
of the diluted solution?
A.5.30
B.9.60
C.10.30
D.10.60
E.10.90
Many homes are heated using natural gas. The combustion of natural gas converts
A.chemical potential energy to thermal energy.
B.thermal energy to mechanical energy.
C.mechanical energy to chemical potential.
D.electrostatic energy to mechanical energy.
E.gravitational energy to acoustic energy.
What nucleus decays by beta emission to produce antimony-121?
A.
B.
C.
D.
E.
