Lindane is an insecticide. If the molar mass is 290 g / mol and the percent composition is 24.8

step 1 To determine the molecular formula, we must first determine the empirical formula. To get the em

Lindane is an insecticide. If the molar mass is 290 g / mol...

Lindane is an insecticide. If the molar mass is $290 \mathrm{~g} / \mathrm{mol}$ and the percent composition is $24.8 \% \mathrm{C}, 2.08 \% \mathrm{H},$ and $73.1 \% \mathrm{Cl}$ what is the molecular formula of lindane?

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Key Concepts

Percent Composition

This concept describes the relative amounts of each element in a compound expressed as a percentage of the total mass. It is a fundamental tool in analyzing the composition of chemical substances and is used to determine the empirical formula from the mass percentages of each element.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole. It is crucial for converting between the mass of a sample and the number of moles, facilitating calculations that relate composition to the number of atoms or molecules in a compound.

Empirical Formula

The empirical formula represents the simplest whole-number ratio of the elements in a compound. It is determined by converting percentage compositions to moles of each element and then simplifying to the smallest integer ratio. This forms the basis for further determination of the molecular formula.

Molecular Formula

The molecular formula indicates the actual number of atoms of each element in a molecule. It is derived by comparing the molar mass of the compound with the mass of the empirical formula unit, typically by determining a multiplying factor that scales the empirical formula to match the given molecular mass.

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