A sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000 g sample of the material was heated carefully in a vacuum oven until no more mass was lost from the sample. After heating, the final weight of the material was 2.6896 g. What was the formula of the hydrated alumina, Al2O3•xH2O? (Enter a whole number for "x") (mol. wt. Al2O3 = 101.96)

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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".