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Study Resources (Chemistry)

21) Which element most readily forms nonstoichiometric hydrides? A) Pd B) Na C) Sb D) Si 22) Which will is least likely to form an interstitial hydride? A) Si B) Pd C) Pt D) Ti 23) Which is not true about elemental oxygen? A) Oxygen exists in two allotropic forms. B) Oxygen has a double bond. C) Oxygen is a diamagnetic element. D) Solid.
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61) What are the three major chemicals that are commercially obtained from seawater? A) sodium chloride, magnesium, and bromine B) sodium chloride, calcium carbonate, sodium sulfate C) sodium chloride, sodium bromide, sodium carbonate D) sodium chloride, calcium chloride, calcium carbonate 62) All of the following are reactions commonly associated with water except A) 2 Na(s) +.
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31) Which group 3A element has the highest electronegativity? A) B B) Al C) Ga D) In 32) Which M3+ ion of group 3A elements is the easiest to reduce? A) B B) Al C) Ga D) In 33) The strongest reducing agent in the group 3A is A) B. B) Al. C) Ga. D) Tl. 34) What is the geometric structure of BF3 and.
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31) What is the relationship between the standard cell potentials, E°, for the following two galvanic cell reactions? I.2 Ag+(aq) + Sn2+(aq) → Sn4+(aq) + 2 Ag(s) II.Ag(s) + 1/2 Sn4+(aq) → 1/2 Sn2+(aq) + Ag+(aq) A) E°(I) = E°(II) B) E°(I) = 2E°(II) C) E°(I) = – E°(II) D) E°(I) = – 2E°(II) 32) What is.
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18.1   Multiple Choice Questions 1) Which individual is generally given credit for the discovery of hydrogen gas? A) Cavendish B) Davy C) Lavoisier D) Priestley 2) The strongest homonuclear single bond is A) H–H B) C–C C) N–N D) O–O 3) Which is not an isotope of hydrogen? A) hydrogen-1 B) hydrogen-2 C) hydrogen-3 D) hydrogen-4 4) Which isotope of diatomic hydrogen should have the highest.
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101) Describe the color changes when sulfur (melting point 113°C, boiling point 445°C) is heated from 25°C to 500°C? It turns from a yellow solid to a A) dark reddish brown liquid and then boils. B) reddish brown solid and then into reddish brown liquid and then boils. C) straw colored liquid which.
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17.1   Multiple Choice Questions 1) Which of the following terms can be used to describe an electrochemical cell in which a spontaneous chemical reaction generates an electric current? I.an electrolytic cell II.a galvanic cell III.a voltaic cell A) only I B) only II C) only III D) II and III 2) Which cell involves a nonspontaneous redox reaction? A) concentration.
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18.2   Algorithmic Questions 1) Water accounts for approximately two-thirds of the mass of the adult human body. If an adult human has a mass of 145 pounds, how many water molecules are there in the adult human's body? A) 96.7 molecules B) 2.43 × 103 molecules C) 1.47 × 1027 molecules D) 2.20 ×.
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11) The iron content of foods can be determined by dissolving them in acid (forming Fe3+), reducing the iron(III) to iron(II), and titrating with cerium(IV):   Identify the two half-reactions in the above reaction. oxidation half-reactionreduction half-reaction A) Fe2+(aq) + e-→ Fe3+(aq)Ce4+(aq) → Ce3+(aq) + e- B) Fe2+(aq) → Fe3+(aq) + e-Ce4+(aq) + e-.
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31) Which is classified as an amphoteric binary oxide? A) B2O3 B) CO2 C) Al2O3 D) SiO2 32) Which one of the following binary oxides is the most acidic? A) Na2O B) Al2O3 C) P2O5 D) Cl2O7 33) Which one of the following binary oxides is the most acidic? A) P2O5 B) As2O5 C) Bi2O5 D) Cl2O7 34) Which of the following oxides has the.
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    121) Which of the elements indicated on the above periodic table has the highest ionization energy? A) element A B) element B C) element C D) element D 122) Which of the elements indicated on the above periodic table is least electronegative? A) element A B) element B C) element C D) element D     123) Which of the elements indicated.
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90) The chlor-alkali industry is based on the electrolysis of aqueous NaCl. What are the products of this electrolysis? A) Na and Cl2 B) NaOH, H2, and O2 C) NaOH, H2, and Cl2 D) NaOH, O2, and Cl2 91) The Hall-Heroult process for the production of aluminum involves the electrolysis of A) an aqueous solution of.
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    143) Which element indicated on the above periodic table forms a binary oxide with molecular structure (1) shown above? A) element A B) element B C) element C D) element D 144) Which element indicated on the above periodic table forms a binary oxide with molecular structure (2) shown above? A) element A B) element B C) element.
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51) What statement is inconsistent about graphite? A) Carbon sheets are separated by a distance of 335 pm and are held together by weak London dispersion forces. B) Electrical conductivity parallel to the planar sheets is 1020 times greater than the conductivity of diamond. C) Pi electrons are delocalized and free to move.
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      86) What group of elements is most likely to form covalent molecular hydrides? A) A B) B C) C D) D 87) What group of elements is most likely to from ionic hydrides of the type MH2? A) A B) B C) C D) D     88) Which element shown on the periodic table above forms a covalent binary hydride with.
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80) What is least easily oxidized? A) Al B) Fe C) Mg D) Zn 81) Aluminum requires relatively little protection from corrosion because A) aluminum has little tendency to react with oxygen. B) the reduction potential for Al3+/Al is very low. C) the oxidation of aluminum produces a hard, relatively impenetrable film of Al2O3. D) aluminum is protected by.
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81) When equilibrium is reached at constant temperature and pressure, A) Q = 1. B) ΔG° = 0. C) S is maximized. D) G is minimized. 82) Calculate Ksp for PbI2 at 25°C based on the following data: A) 4 × 10-31 B) 8 × 10-18 C) 9 × 10-9 D) 5 × 10-5 83) At high temperatures, boron carbide.
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16.2   Algorithmic Questions 1) The entropy change associated with the expansion of one mole of an ideal gas from an initial volume of Vi to a final volume of Vf at constant temperature is given by the equation, ΔS = R ln (Vf/Vi). What is the entropy change associated with the.
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19.3   Short Answer Questions 1) Main-group elements are those elements in groups ________ through ________ of the periodic table. 2) The number of metallic elements in period 3 of the periodic table is ________. 3) Elements in period 2 of the periodic table differ markedly from the heavier elements in the same group.
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Shown below is a galvanic cell with anode compartment b containing anode a and cathode compartment d containing cathode c. Electrons flow through wire f, ions flow through salt bridge e, and the cell potential is read using voltmeter g. This galvanic cell uses the reaction:     115) Identify the electrodes.
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      40) According to Table 17.1, which aqueous metal ion will reduce Ag+, but not Cu2+? A) Fe2+ B) Fe3+ C) Mn2+ D) Sn2+ 41) According to Table 17.1, which will reduce water but not Mg2+? A) Al3+(aq) B) Al(s) C) Na+(aq) D) Na(s) 42) Using Table 17.1, find E° for 2 H2O(l) → 2 H2(g) + O2(g). A) -2.06 V B) -1.23.
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Consider the following galvanic cell.   125) What is the quantitative change in the cell voltage on increasing the ion concentration in the anode compartment by a factor of 10? A) +0.06 V B) +0.03 V C) -0.03 V D) -0.06 V 126) What is the quantitative change in the cell voltage on increasing the ion concentration.
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17.3   Short Answer Questions 1) A galvanic cell uses the reaction Mg(s) + Pb2+(aq) → Mg2+(aq) + Pb(s). Mg(s) → Mg2+(aq) + 2 e– is the ________ half-reaction, which occurs at the ________. 2) In the galvanic cell represented by the shorthand notation Al(s)|Al3+(aq)||Fe3+(aq)|Fe(s) the anode is ________ and the cathode is ________. 3) For the.
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91) What is the molecular structure of phosphorous acid? A) 1 B) 2 C) 3 D) 4 92) Which group 6A element has the most negative electron affinity? A) O B) S C) Se D) Te 93) Which group 6A element is naturally radioactive? A) S B) Se C) Te D) Po 94) What statement is not characteristic about group 6A elements? A) Oxygen, sulfur, and.
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91) In figure (1) below oxygen molecules, represented by unshaded spheres, and chlorine molecules, represented by shaded spheres, are in separate compartments. Figure (2) shows the equilibrium state of the system after the stopcock separating the two compartments is opened. Assuming the oxygen and the chlorine behave as ideal gases,.
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61) Which statement is most inconsistent with the chemistry of silicon? A) In nature, it is generally found combined with oxygen in SiO2 and in various silicate minerals. B) It crystallizes in a diamond-like structure and does not form the graphite-like allotrope. C) It is a hard, gray, semiconducting solid that melts at.
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21) Which one of the following elements forms the strongest π-bonds? A) C B) Si C) Ge D) Sn 22) Which compound exhibits pi bonding? A) F2 B) N2 C) P4 D) S8 23) What is the geometric structure of P4 molecules? A) linear B) rectangular C) square planar D) tetrahedral 24) Which of the group 3A elements is the only one to readily form.
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    74) From the above models of hydrides, indicate the one most representative of an interstitial metallic hydride. A) I B) II C) III D) IV 75) Using the above models of hydrides, indicate the one most representative of an ionic hydride. A) I B) II C) III D) IV In the following pictures representing binary hydrides AHx, lightly-shaded spheres represent.
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19.2   Algorithmic Questions 1) What is the most metallic element of group 3A? A) Al B) Ga C) In D) Tl 2) Which of the following elements forms the most ionic binary hydride? A) K B) Mg C) S D) Cl 3) Which of the following elements exhibits the most metallic character? A) In B) Sn C) Sb D) Te 4) Which one of.
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    130) Which of the elements indicated on the above periodic table has a common allotrope stable at 25°C having molecular structure (1)? A) element A B) element B C) element C D) element D 131) Which of the elements indicated on the above periodic table forms a common allotrope having molecular structure (2)? A) element A B).
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16.3   Short Answer Questions 1) Chemical and physical changes can be classified as spontaneous or nonspontaneous.  At 25°C and 1 atm pressure the decomposition of water into hydrogen and oxygen is classified as ________, and the melting of ice is classified as ________. 2) The sign (+ or –) of ?H is.
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11) Electronegativity of main-group elements generally A) increases from left to right across a period and increases down a group. B) increases from left to right across a period and decreases down a group. C) decreases from left to right across a period and increases down a group. D) decreases from left to.
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