1.

An organic compound contains 69% carbon and 4.8 % hydrogen remainder being oxygen calculate the mass of carbon dioxide and water produced when 0.20 gram of this substance is subjected to complete combustion

Answer»

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.



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