Answer:
moles of oxygen (O₂) = 1.8 mole
Explanation:
Data Given:
moles of Fe (iron) = 2.4 moles
moles of Oxygen (O₂) = ?
Reaction Given
4Fe + 3O₂ --------> 2Fe₂O₃
Solution:
To solve this problem we have to look at the reaction
Reaction Given
4Fe + 3O₂ ----------> 2Fe₂O₃
4 mol 3 mol
So if we look at the reaction; 4 mole of iron (Fe) react with 3 moles of oxygen (O₂) in a rusting reaction, then how many moles of oxygen (O₂) will react with 2.4 moles of iron (Fe)
For this apply unity formula
4 mole of iron (Fe) ≅ 3 moles of oxygen (O₂)
2.4 mole of iron (Fe) ≅ X moles of oxygen (O₂)
By Doing cross multiplication
moles of oxygen (O₂) = 3 moles x 2.4 moles / 4 mole
moles of oxygen (O₂) = 1.8 mol
2.4 mole of iron (Fe) will react with 1.8 moles of oxygen (O₂)
