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Study Resources (Chemistry)

31) In the nuclear transmutation represented by N(n, p)?, what is the emitted particle? A) neutron B) proton C) positron D) alpha particle E) electron 32) In the nuclear transmutation represented by N(n, p)?, what is the product? A) carbon-12 B) carbon-16 C) carbon-14 D) nitrogen-16 E) nitrogen-15 33) Which one of the following requires a particle accelerator to occur? A) Fe  →.
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11) CFC stands for __________. A) chlorinated freon compound B) chlorofluorocarbon C) carbonated fluorine compound D) caustic fluorine carbohydrate E) carbofluoro compound 12) Natural, unpolluted rainwater is typically acidic. What is the source of this natural acidity? A) CO2 B) SO2 C) NO2 D) HCl E) chlorofluorocarbons 13) What compound in limestone and marble is attacked by acid rain? A) hydroxyapatite B) calcium carbonate C).
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21) Which one of the following is a source of carbon dioxide in the troposphere? A) natural gas seepage B) electrical discharges C) fossil-fuel combustion D) volcanic gases E) forest fires 22) The source(s) of sulfur dioxide in the atmosphere is/are __________. A) volcanic gases B) forest fires C) bacterial action D) fossil-fuel combustion E) all of the above 23) Of the.
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11) Which one of the following reactions is a redox reaction? A) NaOH  +  HCl  →  NaCl  +  H2O B) Pb2+  +  2Cl-  →  PbCl2 C) AgNO3  +  HCl  →  HNO3  +  AgCl D) None of the above is a redox reaction. 12) Which substance is the reducing agent in the following reaction? Fe2S3  +  12HNO3 .
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21.2   Bimodal Questions 1) What percentage of electricity generated in the U.S. is from commercial nuclear plants? A) 1% B) 10% C) 19% D) 50% E) 90% 2) By what process does thorium-230 decay to radium-226? A) gamma emission B) alpha emission C) beta emission D) electron capture E) positron emission 3) The alpha decay of what isotope of what element produces lead-206? A).
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21.4   Short Answer Questions 1) What happens in the nucleus of an atom that undergoes positron emission? 2) What is the predominant isotope of uranium? 3) What happens to the atomic mass number and the atomic number of a radioisotope when it undergoes alpha emission? 4) High speed electrons emitted by an unstable nucleus.
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19.1   Multiple-Choice Questions 1) The first law of thermodynamics can be given as __________. A) ΔE = q + w B) C) for any spontaneous process, the entropy of the universe increases D) the entropy of a pure crystalline substance at absolute zero is zero E) ΔS = qrev/T at constant temperature 2) A reaction that.
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20.4   Short Answer 1) The most difficult species to reduce and the poorest oxidizing agent is __________. 2) At constant temperature and pressure the Gibbs free energy value is a measure of the __________ of a process. 3) In the formula ΔG = -nFE, F is the __________. 4) The dependence of cell emf.
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22.1   Multiple-Choice 1) How many oxygen atoms are bonded to each silicon atom in SiO2? A) 1 B) 2 C) 3 D) 4 E) none 2) Of the following, the most nonmetallic element is __________. A) carbon B) selenium C) iodine D) fluorine E) phosphorus 3) The least electronegative of the elements below is __________. A) I B) Cl C) H D) F E) Br 4) In the.
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21) The mode of decay of 32P is __________. A) alpha emission B) beta emission C) positron emission D) electron capture E) neutron capture 22) The belt of nuclear stability ends with the element __________. A) lead B) polonium C) radon D) astatine E) bismuth 23) Which of these nuclides is most likely to be radioactive? A) K B) Al C) I D) Am E) Bi 24) What.
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31) Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and __________. A) zirconium-98. B) krypton-101. C) krypton-103. D) strontium-99. E) zirconium-99. 32) The reaction shown below is responsible for creating 14C in the atmosphere. What is the bombarding particle? N  +  _____   → C  + H A) alpha particle B) electron C) neutron D) positron E) proton 33) How many.
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41) Chemical treatment of municipal water supplies commonly entails use of CaO, Al2(SO4)3, and Cl2. The purpose of adding CaO is to __________. A) remove all HCO3- as solid CaCO3 B) remove all SO42- as solid CaSO4 C) remove all Cl- as solid CaCl2 D) selectively kill anaerobic (but not aerobic) bacteria E) make the.
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11) The primary chemical pollutants that create acid rain are __________ dioxide and __________ oxides. 12) Nitric oxide arises from auto emissions and reacts with oxygen to produce __________ which reacts with sunlight to produce __________  atoms which react with oxygen to produce __________. 13) The salinity, density, and temperature of seawater.
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19.2   Bimodal Questions Use the table below to answer the questions that follow. Thermodynamic Quantities for Selected Substances at 298.15 K (25°C)                                        SubstanceΔH°f (kJ/mol)ΔG°f (kJ/mol)S (J/K-mol) Carbon                               C (s, diamond)              1.88              2.84              2.43    C (s, graphite)              0              0              5.69    C2H2 (g)              226.7              209.2              200.8    C2H4 (g)              52.30              68.11              219.4    C2H6 (g)              -84.68             .
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21.1   Multiple-Choice Questions 1) All atoms of a given element have the same __________. A) mass number B) number of nucleons C) atomic mass D) number of neutrons E) atomic number 2) Atoms containing radioactive nuclei are called __________. A) radionuclides B) radioisotopes C) nucleons D) nuclides E) radioisophores 3) What happens to the mass number and the atomic number of an element.
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20.2   Bimodal Questions 1) The gain of electrons by an element is called __________. A) reduction B) oxidation C) disproportionation D) fractionation E) sublimation 2) __________ is reduced in the following reaction: Cr2O72-  +  6S2O32-  +  14H+  →  2Cr3+  +  3S4O62-  +  7H2O A) Cr6+ B) S2+ C) H+ D) O2- E) S4O62- 3) __________ is oxidized in the following reaction: Cr2O72-  +  6S2O32-  + .
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31) Incomplete combustion of carbon-containing materials occurs when __________. A) there is insufficient oxygen to convert all of the carbon to carbon dioxide B) there are sulfur impurities in the carbon-containing material C) the carbon-containing material is a gas D) the combustion flame is too hot E) there is an excess of oxygen 32) What is.
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18.4   Short Answer Questions 1) The fourth most abundant component of dry air is __________. 2) A chemical bond rupture resulting from the absorption of a photon is called __________. 3) The concept that radiowave propagation was affected by the atmosphere of the earth was discovered by __________. 4) In the equation below, what.
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19.3   Algorithmic Questions 1) The normal boiling point of methanol is 64.7°C and the molar enthalpy of vaporization if 71.8 kJ/mol. The value of ΔS when 2.15 mol of CH3OH (l) vaporizes at 64.7°C is __________ J/K. A) 0.457 B) 5.21 × 107 C) 457 D) 2.39 × 103 E) 2.39 2) The normal boiling point of.
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18.5   True/False Questions 1) When dealing with gases, the volume fraction and the mole fraction are the same. 2) The bond energy of oxygen is higher than that of nitrogen. 3) The partial pressure of a component in a gas mixture is the product of its mole fraction and the total mixture.
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21.3   Algorithmic Questions 1) The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years? A) 0.837 B) 3.23 × 10-15 C) 4.779 D) 1.588 E) 1.163 2) Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage.
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11) The missing product from this reaction is __________. B  +  _____  →  N  +  n A) He B) e C) n D) e E) γ 12) The missing product from this reaction is __________. Fr  → N  +  _____ A) He B) e C) n D) e E) γ 13) The missing product from this reaction is __________. I  → _____  +  e A) Te B).
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11) Of the following, which is an ionic hydride? A) BaH2 B) LiH C) CaH2 D) SrH2 E) all of the above 12) Which compound would produce an acidic aqueous solution? A) KH B) CaH2 C) H2S D) NH3 E) H2O 13) Which compound would produce a basic aqueous solution? A) MgH2 B) H2S C) HCl D) HI E) CH3OH 14) Isotopes of hydrogen A) have the same atomic.
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19.4   Short Answer Questions 1) A reversible change produces the maximum amount of ________ that can be achieved by the system on the surroundings. 2) Calculate ΔG° (in kJ/mol) for the following reaction at 1 atm and 25°C: C2H6 (g) + O2 (g) → CO2 (g) + H2O (l)   (unbalanced) ΔGf° C2H6 (g) =.
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18.2   Bimodal Questions 1) The layer of the atmosphere that contains our weather is called the __________. A) mesosphere B) heterosphere C) stratosphere D) thermosphere E) troposphere 2) Of the noble gases, __________ is present in highest concentration in dry air at sea level. A) Ne B) He C) Xe D) Kr E) Ar 3) The dividing line between the troposphere and stratosphere.
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11) Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus? A) alpha B) beta C) positron emission D) electron capture E) gamma 12) Alpha decay produces a new nucleus whose __________ than those respectively of the original nucleus. A) atomic number is 2 less and mass number.
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Consider the following data for a particular radionuclide: 51) What is the rate constant (in min-1) for the decay of this radionuclide? A) 45 B) 32 C) 0.024 D) 0.032 E) 0.022 52) What is the half-life (in min) of this radionuclide? A) 0.024 B) 0.022 C) 32 D) 0.032 E) 45 53) Cesium-137 undergoes beta decay and has a half-life of.
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11) The second law of thermodynamics states that __________. A) ΔE = q + w B) C) for any spontaneous process, the entropy of the universe increases D) the entropy of a pure crystalline substance is zero at absolute zero E) ΔS = qrev/T at constant temperature 12) Which of the following statements is false? A).
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20.5   True/False Questions 1) The electrode where reduction occurs is called the anode. 2) In a voltaic cell electrons flow from the anode to the cathode. 3) When the cell potential is negative in a voltaic cell the cell reaction will not proceed spontaneously. 4) The standard reduction potential, E°red, is proportional to.
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21.5   True/False Questions 1) Gamma radiation only changes the atomic number but not the mass number of a nucleus. 2) Positron emission causes a decrease of one in the atomic number. 3) The neutron/proton ratio of stable nuclei increases with increasing atomic number. 4) Charged particles are accelerated because the faster they move.
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21) The value of ΔH° for the oxidation of solid elemental sulfur to gaseous sulfur trioxide, 2S (s, rhombic)  +  3O2( g)  →  2SO3 (g) is __________ kJ/mol. A) +790.4 B) -790.4 C) +395.2 D) -395.2 E) +105.1 22) The value of ΔH° for the decomposition of gaseous sulfur trioxide to its component elements, 2SO3 (g)  →  2S (s,.
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