Ammonium perchlorate NH4ClO4 is the solid rocket fuel that was used by the U.S. Space Shuttle and is used in the Space Launch System (SLS) of the Artemis rocket. It reacts with itself to produce nitrogen gas  N2 , chlorine gas  Cl2 , oxygen gas  O2 , water  H2O , and a great deal of energy. What mass of oxygen gas is produced by the reaction of 1.70g  of ammonium perchlorate

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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".