4. How many grams of magnesium oxide can be produced by reacting 0.643 g magnesium that is 94.5% pure with 1.96 x 10 molecules oxygen? Write the balanced equation for this reaction.

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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".