Given the following reaction: $N{a}_{2}Si{O}_{3(s)}+8H{F}_{(aq)}{H}_{2}Si{F}_{6(aq)}+2Na{F}_{(aq)}$

$+3H_2{O}_{(1)}$

If $17\mathrm{.}4g$ of $HF$ is used:

a$)$ Determine the number of moles of $H_{2}O$ formed.

b$)$ Calculate the number of molecules of NaF produced.

c$)$ What mass of $H_{2}Si{F}_6$ is produced?