Question

One kind of battery used in watches contains mercury(II) oxide. As current flows, the mercury(II) oxide is reduced to mercury.
HgO(s) + H2O() + 2 e- Hg() + 2 OH-(aq)
If 2.3 10-5 amperes flows continuously for 1200 days, what mass of Hg() is produced?
A.2.5 g
B.5.0 g
C.9.9 g
D.13 g
E.15 g

Answer

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