Problem: A 2.3-g sample of carbon dioxide (CO2) is fully decomposed into its elements, yielding 0.628 g of carbon and 1.67 g of oxygen.  A sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen,According to Dalton’s atomic theory, what is the empirical formula of the second compound?a) C2O3 b) CO c) C2O

FREE Expert Solution

Based on the fourth postulate in Dalton's atomic theory, the composition should be consistent with the ratio of the second compound. Note that the ratio refers to the masses of the atoms as opposed to the quantities of each. 


mass ratio=mass Omass C=0.5710.429=1.33


Oxygen has an atomic mass of 16.00 g, while carbon has an atomic mass of 12.01 g. 

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Problem Details

A 2.3-g sample of carbon dioxide (CO2) is fully decomposed into its elements, yielding 0.628 g of carbon and 1.67 g of oxygen.  A sample of a different compound decomposes into 0.429 g of carbon and 0.571 g of oxygen,


According to Dalton’s atomic theory, what is the empirical formula of the second compound?


a) C2O3

b) CO 

c) C2O

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