bạn, "có chứa" là sao???
hay là "tác dụng với"
.-.
a) PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
b) \(n_{Al}=\frac{8,1}{27}=0,3mol\)
\(n_{HCl}=\frac{21,5}{36,5}=\frac{43}{73}\left(mol\right)\)
\(\frac{0,3}{2}>\frac{\frac{47}{73}}{6}\)=> Al dư
\(n_{Al\left(dư\right)}=0,3-\left(\frac{\frac{43}{73}.2}{6}\right)=\frac{227}{2190}mol\)
\(m_{Al\left(dư\right)}=\frac{227}{2190}.27=\frac{2043}{730}g\)
\(n_{AlCl_3}=\frac{2}{6}.n_{HCl}=\frac{2}{6}.\left(\frac{43}{73}\right)=\frac{43}{219}mol\)
\(m_{AlCl_3}=\frac{43}{219}.133,5=\frac{3827}{146}g\)