$NTP$ એ $22.4$ લિટર $= 1$ મોલ = $6.022\times10^{23}$ અણ
$ 1.12 \times10^{-7}$ લિટર $ = \,\frac{{6.022\, \times \,{{10}^{23}}\, \times \,1.12\, \times \,{{10}^{ - 10}}}}{{22.4}}\,$ $ = 3.01 \times 10^{12}$
$($ મોલર દળ $Fe=56\, g\, mol^{-1}$, $Cl=35.5\, g\, mol^{-1})$