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The Black, Granular Material That Fills a Dry Cell in a Common

Question 105

Multiple Choice

The black, granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is manganese(II) oxide, MnO2. The oxidation number of manganese in MnO2 is


A) +2.
B) -2.
C) +4.
D) -4.

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