Hydrogen gas (H2) reacts with oxygen gas (O2) to form liquid water (H2O).  Student A writes the chemical equation as:   H 2 + O 2 => H 2O 2  Is the above equation balanced?  Is it correct?  Why or why not?

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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".