# Problem: Determine the empirical and molecular formulas of each of the following substances.Styrene, a compound substance used to make Styrofoam® cups and insulation, contains 92.3% C and 7.7% H by mass and has a molar mass of 104 g/mol.

###### FREE Expert Solution

Molecular formula is a chemical formula that gives the total number of the atoms of elements in a compound.

Empirical formula is a chemical formula that gives the relative proportions of elements in a compound but not the actual number of atoms of elements in a compound.

In this problem, we are provided with mass percentages of C and H for styrene. We will calculate the empirical formula through these steps:

• Dividing the percentages of C and H by their average atomic masses.
• Dividing the obtained numbers by the smallest number among them.
• Rounding off the final numbers to get coefficients of C and H.

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###### Problem Details

Determine the empirical and molecular formulas of each of the following substances.

Styrene, a compound substance used to make Styrofoam® cups and insulation, contains 92.3% C and 7.7% H by mass and has a molar mass of 104 g/mol.