15. In a beaker, there are 45.7 grams of oxygen and 32.0 grams of nitrogen. What is the percentage of nitrogen in the beaker?

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A:

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".