How many electrons are transferred in the redox reaction of a typical flashlight battery?
Zn + 2MnO₂ + H₂O → Zn²⁺ + Mn₂O₃ + 2OH⁻

Question

How many electrons are transferred in the redox reaction of a typical flashlight battery? Zn + 2MnO₂ + H₂O → Zn²⁺ + Mn₂O₃ + 2OH⁻ A) 1 B) 2 C) 3 D) 4 E) 6

Quizplus · Accepted Answer

In the equation, Zn is oxidized (loses electrons) to form ZnS, while MnO2 is reduced (gains electrons) to form MnS and O2-. 
The overall reaction can be broken down as follows:
Zn -> Zn2+ + 2e- (oxidation)
MnO2 + 2e- + 2H+ -> MnS + H2O (reduction)
Therefore, 2 electrons are transferred in this redox reaction.

How Many Electrons Are Transferred in the Redox Reaction of a Typical