Question
Asked Feb 8, 2020
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An unknown compound contains only C , H , and O . Combustion of 7.50 g of this compound produced 15.0 g CO2 and 6.13 gH2O . What is the empirical formula of the unknown compound? Insert subscripts as needed.

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Expert Answer

Step 1

The empirical formula is the chemical formula of any compound that represents the proportions of each elements that is present in the given compound. It does not show the actual number of element as well as cannot give any information about arrangement of atoms in the formula of compound.

Step 2

The relation between molecular formula and empirical formula is:

        Chemistry homework question answer, step 2, image 1

Step 3

To get the chemical formula or empirical formula;

Mass of compound = 7.50 g

Mass of CO2 = 15.0 g

Mass of H2O = 6.13 g

Convert grams of C and H to their respective amount of moles.

Chemistry homework question answer, step 3, image 1

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