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A Mercury Button Battery That Is Used in Watches and Calculators

Question 75

Multiple Choice

A mercury button battery that is used in watches and calculators is powered by the following reaction: Zn(s) + HgO(s) →\rightarrow ZnO(s) + Hg(s) The substance that is oxidized in this battery is:


A) HgO
B) Hg
C) ZnO
D) Zn

Correct Answer:

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