How many moles?

Question

How many moles of aluminum are needed to react with 2.7 mol of FeO ? 2Al(s) + 3FeO(s) → 3Fe(s) +Al₂O₃(s) 

a.1.8 mol
b.2.1 mol
c.2.7 mol
d.5.4 mol

Answer 1

In this equation, all we need to figure out is the molar ratio of the reactants. so for every 3 mol Fe(s) we need 2 mol Al(s). So the answer would be:

 

2.7 mol Fe x 2 mol Al/3 mol Fe = 1.8 mol Al

 

The answer is letter A.