During vigorous exercise, lactic acid (C3H6O3) accumulates in the muscles and causes fatigue.  When the activity level is decreased, oxygen enters the muscles and causes lactic acid to be initially oxidized to pyruvic acid and then is further oxidized to carbon dioxide and water.  The balanced reaction below shows the complete oxidation of 2 mols of lactic acid.  How many grams of carbon dioxide are produced if 9.5 g of lactic acid are produced during vigorous exercise?

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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".