MnO2  +  HCl  --->  MnCl2  +  Cl2  +  H2O    Balance the reaction  If 0.86 mole of MnO2 and 48.2 g of HCl react, which reactant will be used up first?   How many grams of Cl2 will be produced?   Is HCl a strong or a weak acid?

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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".