The reduction of oxygen gas in 1 M aqueous acid is represented by this equation

The reduction of oxygen gas in 1 m aqueous acid is

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42. The reduction of oxygen gas in 1 M aqueous acid is represented by this equation: (E° = 1.23 V) O2(g) + 4H+(aq) + 4e¯ ---> 2H2O(l) The potential for this reaction at physiological pH, where [H+] = 1 x 10¯7and the partial pressure of O2is 1 atm, will be closest to which value? (A) 0.18 V (B) 0.41 V (C) 0.82 V (D) 1.64 V 43. What products are formed during the electrolysis of a concentrated aqueous solution of sodium chloride? I. Cl2(g) II. NaOH(aq) III. H2(g)
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44. A current of 5.00 A is passed through an aqueous solution of chromium(III) nitrate for 30.0 min. How many grams of chromium metal will be deposited at the cathode? 45. The hydrogen line spectrum provides evidence for the 46. What is the number of unpaired electrons in a manganese atom (Z = 25) in its lowest energy states? (A) 1 (B) 3 (C) 5 (D) 7 47. Ions with the electronic structure 1s22s22p63s23p6would not be present in which aqueous solution? 48. An element with the electron configuration [Xe]4f145d76s2, is 49. The neutron/proton ratio in an isotope can be increased by the emission of
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50. The bonds in ozone, O3, are best represented as (A) distinct single and double bonds (B) a single and a double bond that switch positions rapidly (C) something between a single and a double bond (D) two double bonds 51. Which pair of substances will have the most similar geometry? 52. What hybridization is expected for ClF3? 53. Which bond properties are consistent with one another? Bond Order Bond Length Vibrational Frequency 54. Which hydrogen halide has the lowest boiling point? (A) HF (B) HCl (C) HBr (D) HI 55. Which substance has a dipole moment?
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56. What is the correct name for this compound?
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  • Spring '08
  • rogers
  • Oxidation Number, Carboxylic acid, National Chemistry Olympiad

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