Hearing Aid Batteries Utilize a Zinc/air Electrochemical Cell $\rarr$ Zn(s) + 2OH^-(aq)
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Hearing aid batteries utilize a zinc/air electrochemical cell. The reduction half-reactions and standard reduction potentials for this cell are given below. What is the standard cell potential of a zinc/air cell?
Zn(OH) ₂(s) + 2e^- $\rarr$ Zn(s) + 2OH^-(aq)
-1.249 V
O₂(g) + 2H₂O(l) + 4e^- $\rarr$ 4OH^-(aq)
+0.401 V

A) -0.848 V
B) +1.500 V
C) +0.848 V
D) +1.650 V
E) -1.650 V