Question

an organic compound contains 60 %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​

Answer 1

Answer:

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Explanation:

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

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 organic compound.

 

Percentage of hydrogen in organic compound is 4.8.

 

∴0.2 g of organic compound will contain = 4.8 x 0.2/100 = 0.0096 g of H

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.