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Study Resources (Chemistry)

21) Which is expected to have the highest surface tension at 25°? A) C5H12 B) C6H6 C) C2H5OH D) C3H5(OH)3 22) The magnitude of the heats of vaporization, fusion and sublimation of a substance reflect the A) density of the substance. B) magnitudes of the boiling and melting points of the substance. C) strength of the covalent bonds.
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Use the diagram below to answer the following questions.     126) According to the diagram, the solid phase of this substance A) has the same density as the liquid phase. B) is less dense than water. C) is less dense than the liquid phase. D) is more dense than the liquid phase. 127) Melting occurs along the A).
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21) "Equal volumes of different gases at the same temperature and pressure contain the same molar amounts" is another way of stating A) Avogadro's law. B) Boyle's law. C) Charles' law. D) Graham's law. 22) An "empty" aerosol can at 25°C still contains gas at 1.00 atmosphere pressure. If an "empty" can is thrown into.
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91) An unusual correlation exists between the potency of an inhaled anesthetic and its ability to A) dissolve in olive oil. B) effuse through a porous membrane. C) expand and compress. D) react with ozone.     92) What is the pressure (in mm Hg) of the gas inside the above apparatus if the outside pressure, Patm,.
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10.1   Multiple Choice Questions 1) The bonds in the polyatomic ion CO32– are classified as A) ionic. B) metallic. C) nonpolar covalent. D) polar covalent. 2) Which covalent bond is the most polar? A) N-F B) C-F C) Cl-F D) F-F 3) Which has a dipole moment? A) CO2 B) CO32– C) SO2 D) SO42– 4) Which of the following molecules does not have a dipole.
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99) Which drawing best represents hydrogen bonding? A) drawing (1) B) drawing (2) C) drawing (3) D) drawing (4) 100) Which drawing below best represents hydrogen bonding methanol, CH3OH? A) drawing (1) B) drawing (2) C) drawing (3) D) drawing (4) 101) Which drawing best represents hydrogen bonding in methylamine, CH3NH2? A) drawing (1) B) drawing (2) C) drawing (3) D) drawing (4)     102) If.
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31) For the process: HNO3(g) ? HNO3(l) ΔH° is -39.04 kJ/mol and ΔS° is -111.74 J/(mol ? K). What is the normal boiling point of pure HNO3? A) 2.86°C B) 76.2°C C) 270.3°C D) 349.4°C 32) When a liquid is heated at its boiling point, the A) covalent bonds are broken, allowing vaporization to occur. B) temperature of.
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61)   Use the given average bond dissociation energies, D, to estimate ΔH for the following reaction: CI(g) + (g) →C(g) + HI(g) A) -32 kJ B) +32 kJ C) 378 kJ D) -378 kJ 62)   Use the given average bond dissociation energies, D, to estimate ΔH for the following reaction: CBr(g) + (g) →C(g) + HBr(g) A) -70.
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The plots below represent vapor pressure vs. temperature curves for diethyl ether, ethanol, mercury, and water, not necessarily in that order.   107) Based on the relative strengths of the intermolecular forces of attraction of each substance, which is the most likely vapor pressure vs. temperature curve for diethyl ether? A) curve (a) B).
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10.2   Algorithmic Questions 1) Which covalent bond is the most polar?  A) N-F B) C-F C) Cl-F D) F-F 2) Which of the following should have the largest dipole moment? A) F2(g) B) BCl3(g) C) KBr(g) D) CH3I(g) 3) Which of the following molecules does not have a dipole moment? A) C2H2     B) H2O C).
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11) Which of the following compounds exhibits hydrogen bonding? A) CH3Cl B) HI C) H3C-O-CH3 D) NH3 12) Which of the following exhibits hydrogen bonding? A) OH B) O C) D) HCN 13) Which of the following exhibits ion-dipole forces? A) NaCl(s) B) NaCl(aq) C) Na(s) D) Cl2(g) 14) Which is expected to have the largest dispersion forces? A) C2H6 B) C8H18 C) N2 D) CO2 15) Which substance.
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9.1   Multiple Choice Questions 1) Carbon dioxide is a gas which causes environmental concern because of the greenhouse effect. What is the approximate percentage (by volume) of CO2 in the atmosphere? A) less than 0.1% B) about 1% C) about 10% D) more than 20% 2) Which of the following instruments directly measures the pressure of.
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11) Which of the following compounds is an Arrhenius base in water? A) C6H12O6 B) HOCl C) H2SO4 D) C6H5NH2 12) Which of the following compounds is an Arrhenius base? A) CH3OH B) CH3CO2H C) HOCl D) CsOH 13) Which one of the following compounds behaves as an acid when dissolved in water? A) RaO B) C4H10 C) HI D) RbOH 14) Which of.
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A certain mineral crystallizes in the cubic unit cell shown below.     118) What kind of packing do the anions adopt? A) body-centered cubic B) cubic closest packed (face-centered cubic) C) hexagonal closest packed D) simple cubic 119) How many cations and how many anions are in the unit cell? A) 4 cations and 4 anions B) 4.
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8.3   Short Answer Questions 1) Energy can be classified as either ________ energy (energy of motion) or ________ energy (stored energy). 2) Kinetic energy increases with increasing ________ and increasing ________. 3) The SI unit for energy is the ________. 4) ________ energy is the kinetic energy of molecular motion. 5) A reaction for.
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81) The layers of graphite are held together by A) covalent bonds. B) dipole-dipole forces. C) London dispersion forces. D) all of the above 82) Diamond is held together by A) covalent bonds. B) dipole-dipole forces. C) London dispersion forces. D) all of the above 83) Pencil lead is actually A) fullerene. B) graphite. C) lead. D) silica. 84) The critical temperature of a substance.
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41) Arrange the following in order of increasing boiling point. CH3CH2OHCH3CH2CH3H3C-O-CH3CH3CH2NH2 IIIIIIIV A) IV < III < II < I B) II < III < IV < I C) I < IV < III < II D) II < III < I < IV 42) The normal boiling point for HBr is higher than the normal boiling.
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7.3   Short Answer Questions 1) What are the two products of the reaction H3PO4(aq) + 3 KOH(aq) → ? 2) CH3CO2H is an example of a ________ electrolyte. 3) The balanced net ionic equation for the reaction Na2SO4(aq) + Pb(NO3)2(aq) → PbSO4(s) + 2 NaNO3(aq) is ________. 4) The compound K2S is predicted to.
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51) For which should the standard heat of formation ΔH°f, be zero at 25°C? A) O(g) B) O2(g) C) O3(g) D) all the above 52) Which is expected to have the most negative standard enthalpy of formation? A) H2(g) B) O2(g) C) H2O(g) D) H2O(l) 53) The values of ΔH°f for the three states of benzene are approximately -22 kcal/mol,.
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      89) In the drawing of acetaldehyde, CH3CHO, the largest partial positive charge (δ+) occurs on A) atom (a). B) atom (b). C) atom (c). D) atom (d). 90) In the drawing of acetaldehyde, CH3CHO, the largest partial negative charge (δ -) occurs on A) atom (a). B) atom (b). C) atom (c). D) atom (d).     91) In the drawing of.
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9.3   Short Answer Questions 1) Under the same pressure and temperature conditions, the level of water inside a barometer will be ________ than the level of mercury inside the barometer by a factor equal to the ratio of the density of ________ over the density of ________. 2) At an atmospheric pressure.
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71) Cubic closest-packing A) has a body-centered cubic unit cell. B) has a face-centered cubic unit cell. C) has a simple cubic unit cell. D) has the same unit cell as hexagonal closest-packing. 72) The highest coordination number for spherical packing is found in the A) body-centered cubic structure. B) simple cubic structure. C) body-centered cubic and face-centered.
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