1. Under what circumstances are all gases expected to behave most ideally (exhibit ideal
behavior)?
A. low temperatures and high pressures
C. high temperatures and low pressures
B. high temperatures and high pressures
D. gases behave ideally under all circumstances
2. A gas canister is rated to safely hold up to 15.0 atmospheres of pressure. What is the highest
temperature in oC that can safely be used with the filled canister if it contains a pressure of 5.0
atmospheres at a temperature of 25oC?
A. –173°C
B. 1.12 10–3 °C
C. 85.1 °C
D. 99.3°C
E. 621°C
3. What is the molar concentration of an unknown acid H₃A if 25.9 mL of 0.10 Molar NaOH is
needed to neutralize 0.15 L of the acid? H₃A(aq) + 3 NaOH(aq) 3 H2O(l) + Na₃A(aq)
A. 0.0026 M
B. 0.0058 M
C. 0.017 M
D. 0.052 M
E. 17 M
5. Which one of the following atoms has the smallest radius?
A. Ca #20
B. Br #35
C. Xe #54
D. Kr #36
6. Which one of the following atoms has the largest first ionization energy?
A. Ca #20
B. Br #35
C. Xe #54
D. Kr #36
7. Which one of the following atoms has the most negative electron affinity?
A. Ca #20
B. Br #35
C. Xe #54
D. Kr #36
8. Consider several sine waves representing light or electromagnetic radiation. Which one
corresponds to photons with the smallest energy?
A. (a)
B. (b)
C. (c)
D. all electromagnetic radiation has the same photon energy
E. not enough information has been provided to answer the question
9. Which of the following light sources are expected to produce light of a very narrow range of
wavelengths?
A. incandescent bulbs
B. fluorescent bulbs
C. light-emitting diodes or LEDs
D. all of the above
E. none of the above
10. What is the mole fraction of nitrogen N₂ in a vessel that contains 0.39 atm of N₂ and 0.11
atm of O₂?
A. 0.11
B. 0.22
C. 0.28
D. 0.39
E. 0.78
11. What is the wavelength in meters of AM radiowaves with a photon energy of 6.6 x10^–28 J?
A. 3.0 x10^2
B. 0.00332
C. 1.3 x10^–52
D. 1.5 x10^27
12. Which one of the following sets of quantum numbers corresponds to a 3d electron?
A. n = 3, l = 1, ml = –1, ms = +½
B. n = 3, l = 2, ml = +2, ms = –½
C. n = 4, l = 3, ml = –1, ms = +½
D. n = 3, l = 0, ml = 0, ms = –½
13. Which one of the following sets of quantum numbers is valid?
A. n = 3, l = 3, ml = –1, ms = +½
B. n = 2, l = 0, ml = 0, ms = –½
C. n = 4, l = 3, ml = –1, ms = 0
D. n = 3, l = 0, ml = 1, ms = +½
14. Which of the following methods of determining pressure relies on measurements of the
temperature of a filament?
A. barometer
B. capacitance manometer
C. ionization gauge D. mass spectrometer
E. thermocouple gauge
15. Which of the following ions has the smallest radius? Note that they all have the same
number of electrons.
A. Al³⁺
B. Mg²⁺
C. Na⁺
D. O²⁻
E. they all have the same radius
16. Which of the following ionic compounds has the largest lattice energy based only on their
charges?
A. MgO
B. NaCl
C. KBr
D. KF
E. they all have the same lattice energy
17. What mass in grams of N2 is needed to react completely with 1.0 mole of H2 to make
ammonia NH₃? N₂(g) + 3 H₂(g) → 2 NH₃(g)
A. 9.3 g
B. 14 g
C. 28 g
D. 84 g
18. Which of the following is the ground-state electron configuration for Ni (atomic #28)?
A. [Ar] 3d¹⁰ 4s²
B. [Ar] 3d⁸ 4s²
C. [Ar] 4s² 4d⁸
D. [Ar] 4s² 4p⁶ 4d⁸
19. Which of the following is an excited-state electron configuration?
A. 1s² 2s² 2p¹
B. 1s² 2s² 2p⁶ 3s¹
C. 1s² 2s² 2p⁴ 3s¹
D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
20. Which one of the following corresponds to the electron configuration of the stable nitrogen
ion?
A. 1s²
B. 1s² 2s² 2p³
C. 1s² 2s² 2p⁶
D. 1s² 2s² 2p⁶ 3s² 3p¹
21. Tetraethyl lead has been used for several decades as a fuel additive but its use has been
recently discontinued. Tetraethyl lead:
A. is an anti-knocking additive
B. “poisons” catalytic converters
C. is toxic and a health hazard
D. all of the above statements are true
22. Magnesium burns in air with a dazzling brilliance to produce magnesium oxide:
2Mg (s) + O₂ (g) → 2MgO (s) When 2.00 g of magnesium burns in air, 3.15 g of MgO are
recovered. What is the percent yield of this reaction?
A. 63.5%
B. 95.0%
C. 60.3%
D. 50.0%
23. The van der Waals equation for real gases recognizes that __________.
A. gas particles have non-zero volumes and interact with each other
B. the non-zero volumes of gas particles effectively decrease the amount of "empty space"
between them
C. the molecular attractions between particles of gas decreases the pressure exerted by the gas
D. all of the above statements are true
24. Which statement about air pollutants is true?
A. Atmospheric NO₂ and SO₃ react with water to form acid rain.
B. Carbon monoxide emissions arise from sunlight and the presence of VOCs and NO₂.
C. Ozone is produced by the incomplete combustion of ethanol.
D. Atmospheric lead levels are increasing because of incineration of pencils.