Wine goes bad soon after opening because the ethanol (CH,CH,OH) in it reacts with oxygen gas (0,) from the air to form water (H,O) and acetic acid (CH,COOH), the main ingredient of vinegar. What mass of oxygen gas is consumed by the reaction of 1.86 g of ethanol?

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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".