Question

an organic compound contains carbon, hydrogen, nitrogen and oxygen only. 0.135 gram of this compound on combustion produce 0.198 gram of co2 and 0.108 gram of H2O the same amount gave 16.8 ml of nitrogen at 0 degree centigrade and 76 cm Hg of pressure. calculate the percentage of oxygen in the compound?​

Answer 1

Explanation:

in the given question

mass of organic compound=0.246 g

mass of carbon dioxide= 0.198 g

mass of water= 0.1014 g

mass of water=0.1014 g

% of carbon:

44

12

×

0.246

0.198

×100

=21.95%

% of Hydrogen

18

2

×

massofcompound

massofH

2

O

×100

18

2

×

0.246

0.1014

×100

=4.58%