How many moles of aluminium are needed to react completely with 2.5 mol of fe0

1.67 mol

Explanation:

Data given

Amount of aluminum (Al) = To be find

Amount of  FeO = 2.5 mol

Solution:

First we have to write the balanced reaction of aluminum (Al) with FeO

                        2Al + 3FeO > Al₂O₃ + 3Fe

From the reaction we can predict the reacted amount of  aluminium (Al) with FeO as shown below:

                       3FeO + 2Al    > Al₂O₃ + 3Fe

                      3 mol      2 mol

So 3 mole of FeO react with 2 mole of Al

Now to find moles of aluminium that react completely with 2.5 mol of FeO

we have to apply unity formula

if                        3 mole of FeO ≅ 2 mole of Al

then                   2.5 mole of FeO ≅ x mole of Al

By doing cross multiplication

                           mole of Al = 2 x 2.5 / 3

                           mole of Al = 1.67 mol