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How many moles of electrons are required to reduce one mole of oxygen gas (O2) to two moles of oxygen ions (O2-)?

2 e-
4 e-
6 e-
8 e-

User Staale
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2 Answers

4 votes
O₂ + 4e⁻ ------> 2O²⁻

:)
User Rmic
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3 votes

Answer:

The correct answer is 4 electrons.

Step-by-step explanation:

Reduction reaction is defined as chemical reaction in which element gains electrons and it get reduced. Also oxidation state of that element also deceases.


O_2+e^-\rightarrow 2O^(2-)

Charge on both sides should be balanced so for that write 4 as a coefficient of en electron in an above reaction.By this the charge on booth sides becomes (4-).


O_2+4e^-\rightarrow 2O^(2-)

1 mole of oxygen gas gets reduced by 4 electrons into 2 moles of oxygen ions.

User Vardan Agarwal
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