Consider the reaction of sulfur dioxide and water, which is represented by the following equation: 2SO2 (g) + 2H2O (g) → 2H2S (g) + 3O2 (g) How many moles of electrons are transferred according to the equation that is written?

6 moles of electrons are transfered

Explanation:

The actual redox is

S4 + + 6e - long arrow S2 - + 3O2

From the reaction, addition of 6 electrons on the LHS is needed to balance the electron number, hence 6 moles of electrons are transfered