Question

1. s + fe₃o₄ → fe + so₂

Explanation:

Step1: Balance sulfur atoms

Let the coefficient of $S$ be $x$ and of $SO_{2}$ be $x$. Let the coefficient of $Fe_{3}O_{4}$ be $y$ and of $Fe$ be $3y$. The un - balanced equation is $xS + yFe_{3}O_{4}
ightarrow3yFe + xSO_{2}$.

Step2: Balance oxygen atoms

In $Fe_{3}O_{4}$, the number of oxygen atoms is $4y$, and in $SO_{2}$, the number of oxygen atoms is $2x$. So, $4y = 2x$. Let's start with simple integer values. If we set $x = 2$, then $y = 1$.

Step3: Write the balanced equation

The balanced chemical equation is $2S+Fe_{3}O_{4}
ightarrow3Fe + 2SO_{2}$.

Answer:

2, 1, 3, 2