In the reaction $2Al(s)+6HCl(aq)\rightarrow 2Al^{3+}(aq)+6Cl^{-1}(aq)+3H_2(g)$

Question

$\begin{array}{1 1}(a)\;6\;litre\;HCl(aq)\;is\;consumed\;for\;every\;3LH_2(g)\;produced\\(b)\;33.6litre\;H_2(g)\;is\;produced\;regardless\;of\;temperature\;and\;pressure\;for\;every\;mole\;that\;reacts\\(c)\;67.2litre \;H_2(g)\;at\;STP\;is\;produced\;every\;mole\;Al\;that\;reacts\\(d)\;11.2litre\;H_2(g)\;at\;STP\;is\; produced\;every\;mole\;HCl(aq)\;consumed\end{array}$