(આણ્વિય દળ ${Ba}=137 \,{u})$
$\because 233 \,g\,{BaSO}_{4}$ contain $\rightarrow 32\, {~g}$ sulphur
$\therefore 1.44\, {~g} \,{BaSO}_{4}$ contain $\rightarrow \frac{32}{233} \times 1.44\, {~g}$ sulphur
given : $0.471\, {~g}$ of organic compound
$\%$ of ${S}=\frac{32 \times 1.44}{233 \times 0.471} \times 100=41.98 \,\% \approx 42\, \%$