0.25 g of an organic compound 'X' containing carbon, hydrogen and oxygen was analysed by the combustion method. The increase in mass of calciumchloride tube and potash bulbs at the end of the experiment was found to be 0.15 g and 0.1837 g respectively. Calculate the percentage composition of the compound.

0.25 g of an organic compound 'X' containing carbon, hydrogen and oxyg

1.	0.25 g of an organic compound 'X' containing carbon, hydrogen and oxygen was analysed by the combustion method. The increase in mass of calciumchloride tube and potash bulbs at the end of the experiment was found to be 0.15 g and 0.1837 g respectively. Calculate the percentage composition of the compound.
Answer» Solution :Wt. of `CO_2` FORMED = Increase in potash BULBS `= 0.1837` g Wt. of organic COMPOUND = 0.25 `% C = *(12)/(44) xx (0.1837)/( 0.25) xx 100` `= 20.04%` Wt. of `H_2 O` produced = Increase in `CaCl_2` TUBE `= 0.15` g `%H= (2)/( 16) xx (0.15)/( 0.25) xx 100` `= 6.66%` % of `O - 100 - ( 20. 04 + 6.66)` `73.30 %`