Question

On complete combustion, 0.246 g of an organic compound gave 0.198 g of CO2. What is the percentage of Carbon in the compound?

Give explanations...

Answer 1

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

Answer 2

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:

12/44*0.198/0.246*100

=21.95%

% of Hydrogen  

2/18*MASS OF H2O /MASS OF COMPOUND*100

=2/18*0.1014/0.246*100

4.58%