Question

Given the reaction C + O2 ---> CO2 which pair of reactions represents the two half-reactions?

Answer 1

Answer;

C → CO₂ + 4e₋

O₂ + 4e₋→ CO₂

Explanation;

• Given the reaction  C + O2 ---> CO2
• During the formation of a carbon dioxide molecule, the carbon atom shares four electrons with the oxygen atom on the left and four electrons with the oxygen atom on the right.
• This means there will be eight electrons around each atom. Two pairs of electrons shared between two atoms make a double bond between the atoms, which is represented by a double dash.

Answer 2

The answer is a. hope it helps