A 0.2 g sample of an acid gave 0.50 g CO, and 0.089 g
HO. If the molecular weight of the acid is 244 g, what
is the molecular formula of the acid?
Answers
Explanation:
On complete combustion, 0.246 g of an organic compound gave 0.198 g 0f CO2 and 0.1014 g of H2O. What is the ratio of carbon and hydrogen atoms in the compound?

Prajith Greninja
Answered Oct 2, 2017
Given:
mass of organic compound --- 0.246 g
mass of CO2 formed ----- 0.198 g
percentage of Carbon = 12 x mass of CO2 formed x 100
44 mass of organic compound
percentage of carbon = 12 /44 x 0.198/0.246 x 100
percentage of carbon = 2.376/10.824 x 100
% carbon = 0.2195 x 100
%carbon = 21.95
----------------------------------------------------------
21.95% of carbon is present in the compound
Percentage of hydrogen =2/18× mass of H2O/mass of compound×100 = 2×0.1014×100/18×0.246 = 4.58
Hence,the composition of compounds are
CARBON : 21.95%
HYDROGEN : 4.58%.
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