QUESTION & Select all the reactions that are redox reactions. OA. CaCO3 Cao + CO2 B. PCI3 + Cl2 - PCI5 O C. SO2 + H20 →H2SO3 D. Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g)

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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".