Answer:- 30 moles of oxygen are required if 12 moles of [tex]CuFeS_2[/tex] are consumed.
Solution:- The given balanced equation is:
[tex]2CuFeS_2+5O_2\rightarrow 2Cu+2FeO+4SO_2[/tex]
From this balanced equation, there is 2:5 mol ratio between [tex]CuFeS_2[/tex] and [tex]O_2[/tex] .
We are asked to calculate the moles of [tex]O_2[/tex] required to react with 12 moles of [tex]CuFeS_2[/tex].
It's a mol to mol conversion and the set up for this would be as:
[tex]12 mol CuFeS_2(\frac{5 mol O_2}{2 mol CuFeS_2})[/tex]
= [tex]30 mol O_2[/tex]
So, 30 moles of oxygen are required to react with 12 moles of [tex]CuFeS_2[/tex] .
