In air, nitric oxide gas reacts with oxygen to produce nitrogen dioxide, which appears brown in color: NO(g) + O2(g) = 2NO2(g) What mass in grams of nitrogen dioxide would be produced by the complete reaction of 0.551 grams of nitric oxide gas?

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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".