Which of the following statement is/are correct?

Consider the following sequence of reactions:

${\mathrm{B}}_2{\mathrm{O}}_3+{\mathrm{CaF}}_2+{\mathrm{H}}_2{\mathrm{SO}}_4⟶\left(\mathrm{A}\right)+\left(\mathrm{B}\right)+{\mathrm{H}}_2\mathrm{O}$

$\left(\mathrm{A}\right)+{\mathrm{LiAlH}}_4⟶\left(\mathrm{C}\right)\left(\mathrm{g}\right)+\left(\mathrm{D}\right)+\mathrm{LiF}$

$\left(\mathrm{C}\right)+{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{\Delta }}{⟶}\left(\mathrm{D}\right)+{\mathrm{H}}_2\uparrow$

$\left(\mathrm{D}\right)+{\mathrm{Na}}_2{\mathrm{CO}}_3⟶\left(\mathrm{E}\right)+{\mathrm{NaBO}}_2+{\mathrm{CO}}_2\uparrow$

$\left(\mathrm{E}\right)+{\mathrm{NH}}_4\mathrm{Cl}⟶\left(\mathrm{F}\right)+{\mathrm{B}}_2{\mathrm{O}}_3+\mathrm{NaCl}+{\mathrm{H}}_2\mathrm{O}$

What is the empirical formula mass of compound $\left(\mathrm{F}\right)$?