Question

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EXTRA HELP!
3. When 5 moles of iron oxide (Fe,0z) reacts with 25 moles of
carbon monoxide, what is the moles of the product formed
when one of the reagents is used in excess?

Answer 1

Number of moles of Fe = 10 mol

Number of moles of CO₂ = 15 mol

Step-by-step explanation:

Given data:

Number of moles of iron oxide = 5 mol

Number of moles of carbon monoxide = 25 mol

Number of moles of product = ?

Solution:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Now we will compare the moles of reactant with product.

Fe₂O₃ : Fe

1 : 2

5 : 2×5 = 10 mol

Fe₂O₃ : CO₂

1 : 3

5 : 3×5 = 15 mol

CO : Fe

3 : 2

25 : 2/3×25 = 16.7 mol

CO : CO₂

3 : 3

25 : 25

Less number of moles of Fe and CO₂ are formed by iron oxide thus it will act as limiting reactant while CO is inn excess.