$ = \frac{{6.3 \times 1000}}{{63 \times 250}} = 0.4\,N$
Now from
${N_1}{V_1} = {N_2}{V_2}$
$0.4 \times 10 = 0.1 \times V_2$
$V_2 = 40\,mL$
[આપેલ છે: આણ્વિય દળ : $H : 1.0 \,u , O : 16.0\, u$ ]
(આપેલ ) દ્રાવણની ધનતા $=1.25 \mathrm{~g} \mathrm{~mL}^{-1}$, મોલર દળ $\mathrm{g} \mathrm{mol}^{-1}: \mathrm{Na}-23, \mathrm{Cl}-35.5$ )