37. According to the 18-electron rule, which of the following compounds would be expected to be stable? (Atomic numbers: V = 23, Mn = 25, Fe = 26, Ni = 28, Co = 27) (A) V(CO)5 (B) Fe(CO)5⁻ (C) Ni(CO)5 (D) Co(CO)5 (E) Mn2(CO)10

37. According to the 18-electron rule, which of the following compounds would be expected to be stable? (Atomic numbers: V = 23, Mn = 25, Fe = 26, Ni = 28, Co = 27)
(A) V(CO)5
(B) Fe(CO)5⁻
(C) Ni(CO)5
(D) Co(CO)5
(E) Mn2(CO)10

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統計： A(0), B(0), C(1), D(0), E(1) #3252579

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4. A strip of copper is placed in a 1 M solution of copper nitrate, and a strip of silver is placed in a 1 M solution of silver nitrate. The two metal strips are connected to a voltmeter by wires, and a salt bridge connects the solutions. The following standard reduction potentials apply: Ag+(aq) + e- → Ag(s) E° = +0.80 V Cu2+(aq) + 2e- → Cu(s) E° = +0.34 V When the voltmeter is removed and the two electrodes are connected by a wire, which of the following does .not. take place? (A) Negative ions pass through the salt bridge from the silver half-cell to the copper half-cell. (B) Some positive copper ions pass through the salt bridge from the copper half-cell to the silver half-cell. (C) The silver electrode increases in mass as the cell operates. (D) Electrons flow in the external circuit from the copper electrode to the silver electrode. (E) There is a net general movement of silver ions through the salt bridge to the copper half-cell.

37. According to the 18-electron rule, which of the following compounds would be expected to be stable? (Atomic numbers: V = 23, Mn = 25, Fe = 26, Ni = 28, Co = 27)
(A) V(CO)5
(B) Fe(CO)5⁻
(C) Ni(CO)5
(D) Co(CO)5
(E) Mn2(CO)10

詳解 (共 1 筆)

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