Question

when the following equation is balanced, what is the coefficient in front of o₂? so₂ (g) + o₂ (g) → so₃ (g) 3 2 0 1

Explanation:

Step1: Balance sulfur atoms

There is 1 sulfur atom on both sides initially, so sulfur is already balanced.

Step2: Balance oxygen atoms

On the left - hand side, there are 2 oxygen atoms in $SO_2$ and 2 in $O_2$, a total of $2 + 2=4$ oxygen atoms initially. On the right - hand side, there are 3 oxygen atoms in $SO_3$. To balance the oxygen atoms, we use the least - common multiple method. The balanced equation is $2SO_2(g)+O_2(g)
ightarrow2SO_3(g)$.

Answer:

1