Sulfur dioxide is an air pollutant. It reacts with limestone, CaCO3(s), as shown below. 2CaCO3(s) +2SO2(g) + O2(g) 2CaSO4(s) + 2CO2(g) Which of the following rows identifies the process that the oxygen gas undergoes during the reaction above, and its role in the reaction? Select one: a. C. Od. it is reduced, and it is the reducing agent it is oxidized, and it is the oxidizing agent it is reduced, and it is the oxidizing agent it is oxidized, and it is the reducing agent

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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".