Chemistry and mole ratios

Question

When 3.25 moles of Fe₂O₃ react with HCl, how many moles of FeCl₃ are produced?

Answer 1

1). Write the balanced equation:

Fe₂O₃ + 6HCl ==> 2FeCl₃ + 3H₂O

2). Use the mole ratio (stoichiometry) of the balanced equation to find moles of FeCl₃ produced:

3.25 mols Fe₂O₃ x 2 mols FeCl₃ / 1 mol Fe₂O₃ = 6.50 mols FeCl₃ produced