$ = \frac{{wt.\,of\,Sulphur}}{{wt.\,of\,Organic\,Compound}} \times 100$

$8 = \frac{{32}}{{Wt.\,of\,compound}} \times 100$

$\therefore \,Wt.\,of\,compound = \frac{{32}}{8} \times 100 = 400\,g\,mo{l^{ - 1}}\,$