1412_exam4

1412_exam4 - Exam Name_ MULTIPLE CHOICE. Choose the one...

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Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) In the nuclear transmutation, 16 8 O (p, a ) 13 7 N, what is the bombarding particle? A) a beta particle B) a phosphorus nucleus C) a proton D) a gamma photon E) an alpha particle Table 20.2 Half-reaction E e (V) Cr 3+ (aq) + 3e - ¬ Cr (s) -0.74 Fe 2+ (aq) + 2e - ¬ Fe (s) -0.440 Fe 3+ (aq) + e - ¬ Fe 2+ (s) +0.771 Sn 4+ (aq) + 2e - ¬ Sn 2+ (aq) +0.154 2) The standard cell potential (E e cell ) for the voltaic cell based on the reaction below is __________ V. Sn 2+ (aq) + 2Fe 3+ (aq) ¬ 2Fe 2+ (aq) + Sn 4+ (aq) A) -0.46 B) +0.46 C) +0.617 D) +1.39 E) +1.21 3) The standard cell potential (E e cell ) for the voltaic cell based on the reaction below is __________ V. 3Sn 4+ (aq) + 2Cr (s) ¬ 2Cr 3+ (aq) + 3Sn 2+ (aq) A) -1.02 B) +2.53 C) -0.59 D) +0.89 E) +1.94 4) The standard cell potential (E e cell ) for the voltaic cell based on the reaction below is __________ V. Cr (s) + 3Fe 3+ (aq) ¬ 3Fe 2+ (aq) + Cr 3+ (aq) A) +1.57 B) +2.99 C) +1.51 D) +3.05 E) -1.45 5) What is the missing product from this reaction? 32 15 P ¬ 32 16 S + _____ A) 4 2 He B) 0 0 g C) 0 1 p D) 0 -1 e E) 0 1 e 1
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6) In balancing the nuclear reaction 293 92 U ¬ 234 90 E + 4 2 He, the identity of element E is A) Pu. B) Pa. C) U. D) Np. E) Th. 7) The purpose of the salt bridge in an electrochemical cell is to __________. A) provide a source of ions to react at the anode and cathode. B) provide a means for electrons to travel from the anode to the cathode. C) maintain electrical neutrality in the half-cells via migration of ions. D) provide a means for electrons to travel from the cathode to the anode.
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1412_exam4 - Exam Name_ MULTIPLE CHOICE. Choose the one...

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