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21. The oxidation number of chromium (Cr) in the dichromate ion (Cr₂O7²-) is 23. a. +2 b. +4 C. +6 Which substance in the following reaction has undergone reduction? MnO4 ( (aq) + 5 C₂04² 2- (aq) + 16H+, a. MnO4 b. C₂042 C. H 2- d. +7 e. -2 (aq) 2Mn2+ (aq) +10CO2(g) + 8H₂O(1) d. Mn2+ e. CO₂

21. The oxidation number of chromium (Cr) in the dichromate ion (Cr₂O7²-) is 23. a. +2 b. +4 C. +6 Which substance in the following reaction has undergone reduction? MnO4 ( (aq) + 5 C₂04² 2- (aq) + 16H+, a. MnO4 b. C₂042 C. H 2- d. +7 e. -2 (aq) 2Mn2+ (aq) +10CO2(g) + 8H₂O(1) d. Mn2+ e. CO₂

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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21. 23. The oxidation number of chromium (Cr) in the dichromate ion (Cr₂O7²) is d. +7 e. -2 a. +2 b. +4 C. +6 Which substance in the following reaction has undergone reduction? 2- MnO4 (aq) + 5 C₂04² (aq) + 16H+ (aq) a. MnO4 b. C₂04 C. H* 2- 2Mn²+ (aq) + 10CO2(g) + 8H₂O(1) 2+ d. Mn²+ e. CO₂
Transcribed Image Text:21. 23. The oxidation number of chromium (Cr) in the dichromate ion (Cr₂O7²) is d. +7 e. -2 a. +2 b. +4 C. +6 Which substance in the following reaction has undergone reduction? 2- MnO4 (aq) + 5 C₂04² (aq) + 16H+ (aq) a. MnO4 b. C₂04 C. H* 2- 2Mn²+ (aq) + 10CO2(g) + 8H₂O(1) 2+ d. Mn²+ e. CO₂
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