Question

How many moles of FeO are produced of 8 moles of SO2 are produced?

Answer 1

Answer: 0.091 moles

Explanation:

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

To calculate the moles, we use the formula:

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$    ....(1)

Molar mass of $SO_2$ = 44 g/mol

Putting values in above equation, we get:

$Moles=\frac{8g}{44g/mol}=0.182moles$

We are given that for 2 moles of $2CuFeS_2$ produces 2 moles of FeO and 4 moles of $SO_2$ are produced

By stoichiometry of the reaction,

if 4 moles of $SO_2$ are produced, 2 moles of FeO are produced.

So, 0.182 moles of  $SO_2$ are produced= $\frac{2}{4}\times 0.182$= 0.091 moles of FeO are produced.

Answer 2

4 moles as their raport is 4/2 or 2/1