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Question
All of the following half-reactions are balanced except
A) NO3-(aq) + 4H+(aq) + 3e-→NO(g) + 2H2O(l).
B) H3PO3(aq) + H2O(l) →H3PO4(aq) + 2H+(aq) + 2e-.
C) 2Ta(s) + 5H2O(l) →Ta2O5(s) + 10H+(aq) + 10e-.
D) 2H2O(l) + 2e-→H2(g) + 2OH-(aq).
E) H2O2(aq) →2OH-(aq) + 2e-.
Answer
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