A sample of mixture of Na2SO3 and Na2S2O3 is dissolved in water and reacted with HCl. The equations for the reaction of the compounds are: Na2SO3 aq + 2HCl (aq) = 2 NaCl (aq) + SO2 + H2O(l) Na2SO3 aq + 2HCl (aq) = 2 NaCl (aq) + SO2 + S(s) + H2O(l) The reaction yields 6.59 of Ss and 2.21 g of SO2(g) What percentage of the mixture is Na2S2O3?

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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".