2]   If 1.0 g of hydrogen reacts completely with 19.0 g of fluoride. What is the mass of the compound formed? What is the percent by mass of hydrogen in the compound formed?

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A: Lead(IV) selenite is Pb(SeO3)2  Molar mass of compound = 461.2 gm/mol  Mass of compound = 12.47 gm

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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".