all questions please! no explanations needed thanks!! sol Exams st. Which statem

Question

all questions please! no explanations needed thanks!! sol Exams st. Which statement is true regarding the galvanic cell in 66. The cell potential for the following voltaic cell is 0.240 V at 25°C. If the standard cell potential (Ea) is 0.170 V. what is the concentration of the cadmium ion solution? Nisodaq) + Cd(s) ? Ni(s) + CdSOdaq) which an electric current is being produced? Cr" + 2e-?Cu E"-+0.34 V Salt Bridge Salt Bridgo Zn Cu Ni Cd 1.0 M ? M N?SOd (A) Copper ions are produced at the copper electrode. (B) Zinc ions are produced at the copper electrode. (C) The mass of the copper electrode is increasing. (D) (A) 2.0 M (C) 0.066 M (B) 1.0 M (D) 0.0043 M 67. One of the recently named elements is element 117- Tennessine. Identify the missing particle in the nuclear reaction that produces this element Oxidation occurs at the copper electrode 3. Iron (Fe) can be prevented from rusting by coating it with a metal that rusts (oxidizes) more easily. Which metal listed below would be the best choice for coating an iron nail? (A) :Ca (B) ,Ca (C) :Cr (D) :Ca Cur(aq)+2eCu(s Fe? (aq)+2e->Fe(s) AP(aq) + 3e. ? Al(s) 0.34 V -0.45 V -1.66 V 68. You have a sample that contains the same number of atoms of the two radioactive isotopes of Neon: Ne and Ne. At some time in the future you find that the sample (A) A (B) Cu (C) AP (D) Cu 54. Given the standard reduction potential for Cd and Ni: contains more Neon-24 than Neon-23. Which statement about the half lives of these isotopes is true? (A) The half life of Neon-24 is shorter than the half life Cd"(aq) + 2e Cd(s) 0.40 V NP(ag) +2e-Ni(s) -0.25 V of Neon-23. The half life of Neon-24 is longer than the half life of Neon-23. Which pair of substances will react spontaneously? (A) Ni and Cd (C) NP and Cd Consider the equilibrium Under standard conditions at 25 °C, what is Ka for this (B) (C) Because these are both neon isotopes, the half livers (D) All nuclear processes have the same half life. (B) Ni and Cd (D) Ni? and Cd are equal. 5. Eel-1.10 V 69. What would be an acceptable measurement to make with the buret shown? 30 (A) 4.0x10s (C) 3.9x108 (B) 1.6x1037 (D) 6.4x10-3 (A) 30.3 mL (C) 30.33 ml (B) 31.7 mlL (D) 31.67 mL

Explanation / Answer

62. D (OXIDATION occurs at higher potential electrode)
63. B (Cu will undergo max. oxidation because of higher oxidation potential)
64. D
65. B
66. D
67. B
68. C
69. A (lowermost miniscus is considered for calculation.)

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