The Action of Some Commercial Drain Cleaners Is Based on the Following

Multiple Choice

The action of some commercial drain cleaners is based on the following reaction:
2 NaOH(s) + 2 Al(s) + 6 H₂O(l) → 2 NaAl(OH) ₄(s) + 3 H₂(g)
What is the volume of H₂ gas formed at STP when 6.32 g of Al reacts with excess NaOH?

A) 3) 50 L
B) 5) 25 L
C) 7) 87 L
D) 8) 59 L