In the sulphur estimation,$0.471 \, g$ of an organic compound gave $1.44 \, g$ of barium sulphate. The percentage of sulphur in the compound is $...... \%$. (Nearest integer)
(Atomic Mass of $Ba=137 \, u$)

$29.5 \, mg$ of an organic compound containing nitrogen was digested according to Kjeldahl's method and the evolved ammonia was absorbed in $20 \, mL$ of $0.1 \, M \, HCl$ solution. The excess acid required $15 \, mL$ of $0.1 \, M \, NaOH$ solution for complete neutralization. What is the percentage of nitrogen in the compound?

$0.3780 \, g$ of an organic chloro compound gave $0.5740 \, g$ of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound. (in $\%$)

$0.2595 \ g$ of an organic substance in a quantitative analysis yielded $0.35 \ g$ of barium sulphate. The percentage of sulphur in the substance is $...$

Discuss the Dumas method and its principles for the estimation of $N$ present in an organic compound.

What is the formula for calculating the percentage of nitrogen in the Dumas method?