What is Faraday constant, capacity?

Example 47.10 (Capacity of a Daniell cell)

The zinc electrode holds $6.5\,\mathrm{g}$ of zinc that can react, that is $6.5/65.4 = 0.099\,\mathrm{mol}$. Each zinc atom gives two electrons: $n(e^-) = 0.199\,\mathrm{mol}$, so $Q = 0.199 \times 96485 = 1.9 \times 10^{4}\,\mathrm{C}$, about $1.9 \times 10^{4}\,/3600 = 5.3\,\mathrm{A}\,\mathrm{h}$, if the copper ions do not run out first.