On complete combustion of 0.492g of an organic compound containing C, H and O, 0.7938 g of CO2 and 0.4428 g of H2O was produced. The % composition of oxygen in the compounds is____________.

% of C in organic compound = 1 2 1 4 * W C O 2 W . O . C . * 1 0 0 = 9 5 2 . 5 6 2 1 . 6 4 8 = 4 4 % % o f H = 2 1 8 * W H 2 O W . O . C . * 1 0 0 = 2 0 1 8 * 0 . 4 4 2 8 0 . 4 9 2 * 1 0 0 = 8 8 . 5 6 8 . 8 5 6 = 1 0 % = 100 – 54 = 46%

On complete combustion of 0.492g of an organic compound containing C, H and O, 0.7938 g of CO₂ and 0.4428 g of H₂O was produced. The % composition of oxygen in the compounds is____________.

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Alok Kumar Singh | Contributor-Level 10

7 months ago

% of C in organic compound

$= \frac{12}{14} * \frac{W C O_{2}}{W . O . C .} * 100$

$= \frac{952.56}{21.648} = 44 %$

$% o f H = \frac{2}{18} * \frac{W H_{2} O}{W . O . C .} * 100$

= $\frac{20}{18} * \frac{0.4428}{0.492} * 100$

= $\frac{88.56}{8.856} = 10 %$

= 100 – 54 = 46%

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