a) nAl= 0,2(mol)
PTHH : 2 Al + 6 HCl -> 2 AlCl3 + 3 H2
0,2_________0,6____0,2______0,3(mol)
b) V(H2,đktc)= 0,3.22,4= 6,72(l)
c) H2 + CuO -to-> Cu + H2O
0,3____0,3_______0,3(mol)
mCu= 0,3.64= 19,2(g)
a)\(2Al+6HCl--.2AlCl3+3H2\)
b)\(n_{Al}=\frac{5,4}{27}=0,2\left(mol\right)\)
\(n_{H2}=\frac{3}{2}n_{Al}=0,3\left(mol\right)\)
\(V_{H2}=0,3.22,4=6,72\left(l\right)\)
c)\(H2+CuO--->Cu+H2O\)
\(n_{Cu}=n_{H2}=0,3\left(mol\right)\)
\(m_{Cu}=0,3.64=19,2\left(g\right)\)