an organic compound contains 69 carbon and 4.8 hydrogen the remainder being oxygen calculate the mass of carbon dioxide and water produced by 0.20 gram of the substance is subjected to complete combustion
Answers
Percentage of carbon in organic compound = 69 %
So, 100 g of organic compound contains 69 g of carbon.
∴ 0.2 g of organic compound will contain = 69 x 0.2 /100 = 0.138 g of carbon
The molecular mass of carbon dioxide, CO2 = 44 g
So, 12 g of carbon is contained in 44 g of CO2.
∴0.138 g of carbon will be contained = 44 x 0.138/12 = 0.506 g of carbon
Thus, 0.506 g of CO2 will be produced on complete combustion of 0.2 g of the organic compound.
Percentage of hydrogen in the organic compound is 4.8.
∴0.2 g of organic compound will contain = 4.8 x 0.2/100 = 0.0096 g of H
The molecular mass of water (H2O) is 18 g.
∴0.0096 g of hydrogen will be contained = 18 x 0.0096/2 = 0.864 g of water
Thus, 0.0864 g of water will be produced on complete combustion of 0.2 g of the organic compound.