The correct statement regarding the limiting reactant for the reaction between 4 moles of iron and 3 moles of oxygen is: They are both equal. (Option A)
We'll begin by writing the balanced equation for the reaction between iron and oxygen. This is given below:
4Fe + 3O₂ --> 2Fe₂O₃
SUMMARY
From the balanced equation above,
4 moles of Fe reacted with 3 moles of O₂
The limiting reactant is the reactant that is consumed completly in a chemical reaction.
The limiting reactant can be obtain as illustrated below:
From the balanced equation above,
4 moles of Fe reacted with 3 moles of O₂
From the illustration above, we can see that 3 moles of Fe required 4 moles of O₂ for complete reaction.
Thus, Fe and O₂ are both the limiting reactant.
Therefore, we can conclude that Fe and O₂ are equal
Learn more about stoichiometry:
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