a)\(Zn+H2SO4-->ZnSO4+H2\)
b)\(n_{Zn}=\frac{6,5}{65}=0,1\left(mol\right)\)
\(n_{Zn}< n_{H2SO4}\)
=>H2SO4 dư
\(n_{H2SO4}=n_{Zn}=0,1\left(môl\right)\)
\(n_{H2SO4}dư=0,2-0,1=0,1\left(mol\right)\)
\(m_{H2SO4}dư=0,1.98=9,8\left(g\right)\)
c)\(n_{H2}=n_{Zn}=0,1\left(mol\right)\)
\(V_{H2}=0,1.22,4=2,24\left(l\right)\)