For 3Fe + 4H₂O → Fe₃O₄ + 4H₂, how many moles of H₂ form ideally from 6 mol Fe with other reactants in excess?

A) 16 mol

B) 9 mol

C) 8 mol

D) 6 mol

Answer: C

Explanation: The balanced equation gives a 3:4 mole ratio between Fe and H₂. Multiply 6 mol by 4/3 to get 8 mol of H₂.