Quinone, which is used in the dye industry and in...

Quinone, which is used in the dye industry and in photography, is an organic compound containing only $\mathrm{C}, \mathrm{H}$, and $\mathrm{O}$. What is the empirical formula of the compound if $0.105 \mathrm{~g}$ of the compound gives $0.257 \mathrm{~g} \mathrm{CO}_{2}$ and $0.0350 \mathrm{~g}$ $\mathrm{H}_{2} \mathrm{O}$ when burned completely?

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Key Concepts

Empirical Formula Determination

Determining an empirical formula involves finding the simplest whole-number ratio of atoms in a compound. By calculating the moles of each element (deduced from combustion data) and comparing their ratios, one can express the simplest formula that represents the composition of the compound.

Stoichiometry

Stoichiometry involves the calculation of reactants and products in chemical reactions. In the context of combustion analysis, it is used to relate the masses of CO2 and H2O produced to the moles of carbon and hydrogen, respectively, which then helps to determine the empirical formula of the original compound.

Combustion Analysis

Combustion analysis is a technique used to determine the elemental composition of a compound by burning it in oxygen and measuring the amounts of combustion products like CO2 and H2O. From these products, one can deduce the amounts of carbon and hydrogen originally present in the compound.

Mole Concept

The mole concept is fundamental in chemistry for converting between mass and number of particles. It allows chemists to calculate the number of moles of an element present by using its molar mass, an essential step in determining the proportions of elements in a compound.

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