0.92 g of an organic compound was analysed by combustion method. The mass of the U-tube increased by 1.08 g. What is the percentage of hydrogen in the compound?

Question

0.92 g of an organic compound was analysed by combustion method. The mass of the U-tube increased by 1.08 g. What is the percentage of hydrogen in the compound? (A) 13.04 % (B) 52.317 % (C) 65.21 % (D) 11.30 %

Tardigrade Admin · Accepted Answer

Increase in mass of U-tube = 1.08 g Mass of water formed = 1.08 g 18 g H2O ≡ 2 g H 1.08 g H2O =(2/18) × 1.08 % of hydrogen = (2/18) × (1.08/0.92) × 100=13.04 %

Q. $0.92 g$ of an organic compound was analysed by combustion method. The mass of the $U$ -tube increased by $1.08 g$ . What is the percentage of hydrogen in the compound?

$13.04%$

$52.317%$

$65.21%$

$11.30%$

Increase in mass of $U$ -tube = $1.08 g$
Mass of water formed = $1.08 g$
$18 g H_{2} O \equiv 2 g H$
$1.08 g H_{2} O = \frac{2}{18} \times 1.08$
% of hydrogen $= \frac{2}{18} \times \frac{1.08}{0.92} \times 100 = 13.04%$

Q. 0.92g of an organic compound was analysed by combustion method. The mass of the U-tube increased by 1.08g. What is the percentage of hydrogen in the compound?

13.04%

52.317%

65.21%

11.30%