How many moles of aluminum is needed to react with 6.34 moles of Fe 3 O 4 in the reaction below?

8 Al + 3 Fe3O4 - -> 4 Al2O3 + 9 Fe

Input your answer without units.

16.9 mol

Explanation:

8Al + 3Fe₃O₄ ⟶ 4Al₂O₃ + 9Fe

You want to convert moles of Fe₃O₄ to moles of Al.

The molar ratio is 8 mol Al:3 mol Fe₃O₄. Calculate the moles of Al

Moles of Al = 6.34 * 8/3

Moles of Al = 6.34 * 2.667

Moles of Al = 16.9 mol Al

8 Al + 3 Fe3O4 - -> 4 Al2O3 + 9 Fe

8 mol = 3 mol

x. mol = 6.34mol

x=16.7 mol of Al