Phản ứng xảy ra:
\(Y+3H_2SO_4\rightarrow Y_2\left(SO_4\right)_3+3H_2\)
Ta có:
\(n_{H2}=\frac{3,36}{22,4}=0,15\left(mol\right)\)
\(\Rightarrow n_Y=\frac{2n_{H2}}{3}=0,1\left(mol\right)\)
\(\Rightarrow M_Y=\frac{2,7}{0,1}=27\Rightarrow Y\left(Al\right)\)
Theo phản ứng:
\(n_{Al2\left(SO4\right)3}=\frac{1}{2}n_{Al}=0,05\left(mol\right)\)
\(\Rightarrow m_{Al2\left(SO4\right)3}=0,05.\left(27.2+96.3\right)=17,1\left(g\right)\)