How many moles of aluminium metal are required to make 300 mol of hydrogen gas?

Answer 1

Production of hydrogen gas (H2) from aluminum (Al) would generally require reaction of Al with acid, e.g. HCl.

2Al(s) + 6HCl(aq) ==> 2AlCl₃(aq) + 3H₂(g) ... balanced equation

300 mol H₂ x 2 mol Al / 3 mol H₂ = 200 mols Al needed