What volume of hydrogen is evolved at STP when 2.7g aluminium. Reaches with aq NaOH???

Write and balance the equation.

Convert 27 g Al to mols. mols = grams/atomic mass = ?
Using the coefficients in the balanced equation, convert mols Al to mols H2.
Then mols H2 x 22.4L/mol = L H2 at STP