Adenine, a nitrogen-containing compound found in DNA and...

Adenine, a nitrogen-containing compound found in DNA and RNA, is $44.5 \%$ C, $3.70 \%$ H, and $51.8 \%$ N. If adenine has an experimental molar mass of $135 \mathrm{~g}$, what is its molecular formula?

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Key Concepts

Molar Mass

Molar mass is the mass of one mole of a compound, typically expressed in grams per mole (g/mol). It serves as a bridge between the experimental data and the theoretical calculations, allowing chemists to scale the empirical formula to match the experimentally determined molar mass.

Molecular Formula Determination

The molecular formula provides the actual number of atoms of each element in a molecule. It is determined by comparing the molar mass of the compound to the mass of the empirical formula. When the molar mass is a multiple of the empirical formula mass, this multiple is used to obtain the molecular formula, which accurately reflects the compound's molecular structure.

Percent Composition

This concept involves determining the percentage by mass of each element in a compound. It is a fundamental method used to analyze the composition of substances and is derived from experimental data, which provides insight into the ratios of atoms present in the sample.

Empirical Formula Determination

The empirical formula represents the simplest whole-number ratio of the elements in a compound. To determine it, the mass percentages are converted to moles by dividing by the atomic masses, and then the ratios are simplified. This process forms the basis for understanding the composition of a compound at its most fundamental level.

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