\(n_{Zn}=\dfrac{6.5}{65}=0.1\left(mol\right)\)
\(n_{H_2SO_4}=0.25\cdot1=0.25\left(mol\right)\)
\(Zn+H_2SO_4\rightarrow ZnSO_4+H_2\)
\(1..........1\)
\(0.1.........0.25\)
\(LTL:0.1< 0.25\)
\(\Rightarrow H_2SO_4dư\)
\(m_{ZnSO_4}=0.1\cdot161=16.1\left(g\right)\)