Your balanced equation is
This tells you that
This is called the molar ratio of
You want to convert the given moles of
We can use the molar ratio to create a conversion factor.
It will be either
We choose the one that will give us the correct units in the answer.
It will be the second one. Then
Notice that the units cancelled to give the desired units of
If we had chosen the other conversion factor, we would not have gotten the correct units.