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Study Resources (Chemistry)

11.1   Multiple-Choice Questions 1) Which of the following mixtures have components which can be separated by filtration? A) colloids B) solutions C) suspensions D) All of these 2) Stainless steel is an example of a ________ solution. A) gas/solid B) liquid/liquid C) solid/liquid D) solid/solid 3) In most liquid solutions, the component present in the larger amount is called the A) dispersed.
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21) The property of a liquid that measure the liquid’s resistance to flow is A) boiling point. B) heat of vaporization. C) surface tension. D) viscosity. 22) Which of the following is most likely to have the highest viscosity at 25°C? A) C4H10 B) HOCH2CH2OH C) C8H18 D) C2H5NH2 23) Which is expected to have the highest surface tension at.
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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 these 82) Diamond is held together by A) covalent bonds. B) dipole-dipole forces. C) London dispersion forces. D) All of these 83) Pencil lead is actually A) fullerene. B) graphite. C) lead. D) silica. 84) The critical temperature of a substance is the A).
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Arrows in the energy diagram below represent enthalpy changes occurring in the exothermic formation of a solution: ΔHsoln = enthalpy of solution ΔHsolute-solute = enthalpy change involving solute-solute interactions ΔHsolute-solvent = enthalpy change involving solute-solvent interactions ΔHsolvent-solvent = enthalpy change involving solvent-solvent interactions 112) Which arrow represents ΔHsoln? A) arrow (a) B) arrow (b) C) arrow (c) D) arrow.
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51) Which of the following statements is not consistent with the properties of a molecular solid? A) a compound that conducts electricity when molten B) a low melting solid C) a solid formed by the combination of two nonmetallic elements D) a solid that is a nonconductor of electricity 52) Which of the following forms.
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101) Which drawing best represents hydrogen bonding in methylamine, CH3NH2? A) drawing (1) B) drawing (2) C) drawing (3) D) drawing (4)     102) If figure (1) represents the vapor pressure of water at 25°C, which figure represents the vapor pressure of water at 45°C? A) figure (2) B) figure (3) C) figure (4) 103) If figure (1) represents the.
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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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11) Which compound below could have a zero dipole moment? A) CCl2F2 (tetrahedral) B) CuCl2F2 (tetrahedral) C) PtCl2F2 (square planar) D) SCl2F2 (see-saw) 12) Which has the smallest dipole-dipole forces? A) CH3F B) HCl C) N2 D) CO 13) Which of the following compounds exhibits hydrogen bonding? A) CH3Cl B) HI C) H3C-O-CH3 D) NH3 14) Which of the following exhibits ion-dipole forces? A) NaCl(s) B) NaCl(aq) C).
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31) CFC-11 (trichlorofluoromethane, CCl3F) has been used for many years as the working fluid in refrigerators. Given its heat of vaporization is 26.88 kJ/mol and its entropy of vaporization is 90.51 J/(mol ? K), what is the boiling point of CFC-11? A) -272.9°C B) 0.297°C C) 2.44°C D) 23.8°C 32) How much heat is.
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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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71) The solubility of gaseous solutes in liquid solvents is greater when the A) external pressure over the solution is increased. B) external pressure is decreased. C) partial pressure of the gas above the solution is increased. D) partial pressure of the solvent is increased. 72) In which case should CO2(g) be more soluble in.
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91) Which of the following regions of the earth's atmosphere contains the ozone layer? A) mesosphere B) stratosphere C) thermosphere D) troposphere 92) One reaction that contributes to photochemical smog is shown below. Which of the species involved contains one or more unpaired electrons? NO2(g) + hυ →NO(g) + O(g) A) only NO2(g) B) only NO2(g) and NO(g) C).
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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 moment? A).
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31) Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm. At this level, how many grams of formaldehyde are permissible in a 6.0-L breath of air having a density of 1.2 kg/m3? A) 3.8 × 10-2 g formaldehyde B) 5.4 × 10-6 g formaldehyde C) 3.8 g.
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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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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 a.
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