To a crucible and cover weighing 33.392 g is added a sample of a copper (II) chloride hydrate (CuCl2 • nH2O). The mass of the crucible, cover and contents is 34.405 g. The hydrate sample was heated until all the water was driven off. Upon cooling, the sample plus crucible and cover weighed 33.881 g. The molar mass of anhydrous CuCl2 is 134.456 g/mol. (a) How many moles of water are in the hydrate? (b) How many moles of anhydrous CuCl2 are in the hydrate? (c) What is the formula of the copper (II) chloride 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".