0.2346 g of an organic compound containing C, H & O, on combustion giv

1.	0.2346 g of an organic compound containing C, H & O, on combustion gives 0.2754 g of H2O and 0.4488 g CO2 . Calculate the % composition of C, H & O in the organic compound.
Answer» Weight of organic substance (w) = 0.2346 g Weight of water (x) = 0.2754 g Weight of CO₂ (y) = 0.4488 g Percentage of carbon = \(\frac{12}{44}\) x \(\frac{y}{w}\) x 100 = \(\frac{12}{44}\) - \(\frac{0.4488}{0.2346}\) x 100 = 52.17% Percentage of hydrogen = \(\frac{2}{18}\) x \(\frac{y}{w}\)x 100 = \(\frac{2}{18}\) x \(\frac{0.2754}{0.2346}\) x 100 = 13.04% Percentage of oxygen = [100-(52.17+13.04)] = 100 - 65.21 = 34.79%

0.2346 g of an organic compound containing C, H & O, on combustion gives 0.2754 g of H2O and 0.4488 g CO2 . Calculate the % composition of C, H & O in the organic compound.

Answer»

Weight of organic substance (w) = 0.2346 g

Weight of water (x) = 0.2754 g

Weight of CO₂ (y) = 0.4488 g

Percentage of carbon = \(\frac{12}{44}\) x \(\frac{y}{w}\) x 100

= \(\frac{12}{44}\) - \(\frac{0.4488}{0.2346}\) x 100 = 52.17%

Percentage of hydrogen = \(\frac{2}{18}\) x \(\frac{y}{w}\)x 100

= \(\frac{2}{18}\) x \(\frac{0.2754}{0.2346}\) x 100 = 13.04%

Percentage of oxygen = [100-(52.17+13.04)] = 100 - 65.21 = 34.79%