Question
Can the results of a combustion analysis ever give the true molecular formula of a compound?
Step 1
In this process, a sample is burned in excess oxygen to produce carbon dioxide, water, and other products. The amounts of these products are then measured to determine the amounts of carbon, hydrogen, and other elements in the original sample. Show more…
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A combustion analysis is performed on a compound that contains only C and H. The analysis produces 7.69 g of CO2 and 3.17 g of H2O. In addition, it was determined that the molar mass of the compound is 56.107 g/mol. Determine the molecular formula of the compound. Given molar masses: CO2: 44.009 g/mol; H2O: 18.015 g/mol. Enter integer values below:
Combustion analysis of a $1.000$ -gram sample of a compound known to contain only carbon, hydrogen, and oxygen produces $1.500$ grams of $\mathrm{CO}_{2}(g)$ and $0.409$ grams of $\mathrm{H}_{2} \mathrm{O}(g)$. Determine the empirical formula of the compound.
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