Trichloroethylene (TCE) is a common solvent used to degrease...

Trichloroethylene (TCE) is a common solvent used to degrease machine parts. Calculate the empirical formula for TCE if the percent composition is $18.25 \% \mathrm{C}, 0.77 \% \mathrm{H},$ and $80.99 \% \mathrm{Cl}$

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Key Concepts

Conversion from Mass Percentages to Moles

This key process involves taking the mass percentage of each element and dividing it by the element's molar mass. This step converts the mass information into moles, which allows for a direct comparison of the number of atoms of each element in a compound.

Mole Ratio

After converting each element’s mass percentage into moles, the mole ratio is determined by dividing each element’s mole value by the smallest number of moles calculated. This ratio is essential for arriving at the empirical formula by showing the simplest integer relationship among the atoms.

Percent Composition

This concept refers to the percentage by mass of each element present in a compound. It is used to determine how much of each element, by weight, is in a sample and serves as the starting point for calculating formulas from experimental data.

Empirical Formula

The empirical formula represents the simplest whole number ratio of atoms in a compound. It is derived from converting the percent composition of each element to moles and then simplifying these values to their smallest integer ratio.

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