\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
Định Luật Bảo toàn khối lượng :
\(m_{Al}+m_{H_2SO_4}=m_{Al_2\left(SO_4\right)_3}+m_{H_2}\)
\(\Rightarrow m_{H_2}=2.7+14.7-17.1=0.3\left(g\right)\)
\(n_{H_2}=\dfrac{0.3}{2}=0.15\left(mol\right)\)
\(V_{H_2}=0.15\cdot22.4=3.36\left(l\right)\)