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Use the following half-reactions to write three spontaneous reactions, and calculate E cell for each reaction:...

Use the following half-reactions to write three spontaneous reactions, and calculate E cell for each reaction:

a. Au+ (aq) + e- ----> Au (s) E= 1.69 V

b. N2O (g) + 2H+ (aq) + 2 e- ----> N2 (g) + H2O (l) E= 1.77 V

c. Cr3+ (aq) + 3e- ---> Cr (s) E= -0.74 V

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