A 13.2010g sample of hydrated zinc sulfate, ZnSO4 • xH2O), was strongly heated until no further change in mass was recorded. The final mass of solid product was found to be 7.3997g. On heating, all of the water of crystallization had evaporated, as shown by the equation: ZnSO4 • xH2O -> ZnSO4 + xH2O  Calculate the number of moles of water of crystallization in the sample. Write in a padpaper and show the complete solution

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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".