An organic compound contains 69% carbon and 4.8% hydrogen, the remainder being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20 g of this substance is subjected to complete combustion.
Percentage of carbon in organic compound=69%
That is,100g of organic compound contains 69g of carbon
So, 0.2g of organic compound will contain=
=0.138g of C
Molecular mass of carbon dioxide, CO2=44g
i.e., 12g of C will be contained in 
=0.506g of CO2.
Thus,0.506g of CO2 will be produced on complete combustion of 0.2g of organic compound.
Percentage of hydrogen in organic compound is 4.8
i.e., 100 g of organic compound contains 4.8g of hydrogen.
Therefore,0.2 g of organic compound will contain=(
=0.0096g of H
It is known that molecular mass of water=18g
Thus,2 g of hydrogen will be contained in=
=0.0864g of water.
Thus,0.0096g of water will be produced on complete combustion of 0.2g of the organic compound.