A Mercury Button Battery That Is Used in Watches and Calculators

question 12

Multiple Choice

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

• A)HgO
• B)Hg
• C)ZnO
• D)Zn

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Definitions:

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Header Button

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