a:
\(n_{Al}=\dfrac{5.4}{27}=0,2\left(mol\right)\)
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
0,2 0,6 0,2 0,3
\(m_{AlCl_3}=0,2\left(27+35,5\cdot3\right)=26,7\left(g\right)\)
b: \(100ml=0,1\left(lít\right)\)
\(C_{M\left(HCl\right)}=\dfrac{0.6}{1}=0,6\left(\dfrac{mol}{lít}\right)\)
c: \(n_{H_2}=3\cdot\dfrac{0.2}{2}=0,3\left(mol\right)\)
=>\(V_{H_2}=0,3\cdot22,4=6,72\left(lít\right)\)