A 1.0-g sample of carbon dioxide (CO2) is fully decomposedinto its elements, yielding 0.273 g of carbon and 0.727 g ofoxygen. (a) What is the ratio of the mass of O to C? (b) If asample of a different compound decomposes into 0.429 g ofcarbon and 0.571 g of oxygen, what is its ratio of the mass ofO to C? (c) According to Dalton’s atomic theory, what is theempirical formula of the second compound?

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".