A solid hydrate weighing 2.682 g was heated to drive off water. A solid anhydrous residue remained. Which weighed 1.420 g. a) Calculate the % water in the hydrate b) If the anhydrous residue has a formula weight of 142g/mole, how many moles of water are present in one mole of the hydrate?

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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".