Aluminium reacting with H2 (g) at STP - please help

2 Al (s) + 6 HCl (aq) ----------> 2 AlCl3 (aq) + 3 H2 (g)

What is the mass of Al (s) needed to produce 508.8 mL of H2 gas at STP?? Any help with this question would be really appreciated!!!

2 Al + 6 HCl → 2 AlCl3 + 3 H2

(0.5088 L) / (22.414 L/mol) x (2/3) x (26.9815 g Al/mol) = 0.4083 g Al