The reaction between solid sodium and Iron (III) oxide is one in a series of reactions that inflates an automobile airbag.

6Na(s) +   Fe₂O₃ (s) → 3 Na₂O (s) + 2 Fe(s)

If 100.0 g Na and 100.0 g Fe₂O₃ are used in this reaction, determine:

a) The limiting reactant

b) The reactant in excess

c) The mass of solid iron produced

d) The mass of the excess reactant that remains after the reaction is complete