Question

How many moles of O2 are required if 12 moles of CuFeS2 are consumed?

Answer 1

Answer:- 30 moles of oxygen are required if 12 moles of
`CuFeS_2` are consumed.

Solution:- The given balanced equation is:

`2CuFeS_2+5O_2\rightarrow 2Cu+2FeO+4SO_2`

From this balanced equation, there is 2:5 mol ratio between
`CuFeS_2` and
`O_2` .

We are asked to calculate the moles of
`O_2` required to react with 12 moles of
`CuFeS_2`.

It's a mol to mol conversion and the set up for this would be as:

`12 mol CuFeS_2((5 mol O_2)/(2 mol CuFeS_2))`

=
`30 mol O_2`

So, 30 moles of oxygen are required to react with 12 moles of
`CuFeS_2` .