Chemistry Question on Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions

Question

In the reaction, $8 Al +3 Fe _{3} O _{4} \longrightarrow 4 Al _{2} O _{3}+9 Fe$ the number of electrons transferred from the reductant to the oxidant is

Answer 1

Solution

$8 Al \longrightarrow 8 Al ^{3+}+24 e^{-}$
$9 Fe ^{8 / 3+}+24 e ^{-} \longrightarrow 9Fe$