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How many moles of aluminum are needed to react completely with 5.4 mol of FeO?

Answer 1

Mateo Aguilar

Do you mean the #"thermite reaction"#? The substrate is not #"ferrous oxide"#.

Melted iron and aluminum oxide are produced when ferric oxide and aluminum react:

#Fe_2O_3(s) + 2 Al(s)rarr 2 Fe(l) + Al_2O_3(s)+Delta#

On railroads, this reaction is still used to weld sections of rail track together.

Anyway, let me ask you to clarify.

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Answer 2

Owen Ambrose

The balanced chemical equation for the reaction between aluminum (Al) and iron(II) oxide (FeO) is:

2Al + FeO -> Al2O3 + Fe

From the balanced equation, it is clear that 2 moles of aluminum react with 1 mole of FeO.

Therefore, if 5.4 moles of FeO react completely, then (5.4 moles FeO) * (2 moles Al / 1 mole FeO) = 10.8 moles of aluminum are needed.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.