a
\(\begin{array}{l}
{\rm{Zn}} + {{\rm{H}}_{\rm{2}}}S{O_4} \to ZnS{O_4} + {H_2}\\
\,\,\,\,\,\,\,\,\,\,\frac{1}{{100}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\frac{{224}}{{22400}} = \frac{1}{{100}}
\end{array}\)
વજન \( = \frac{{\rm{1}}}{{{\rm{100}}}} \times 65 = 0.65\,g\)