A 0.755-g sample of hydrated copper(II) sulfate (CUSO4•NH2O) was heated until it lost all the water molecules of crystallization to form anhydrous copper(II) sulfate (CuSO4) with a mass of 0.483 g. (a) Determine the value of n. (b) (i) Calculate the experimental percentage composition of CuSO4•nH2O by mass of water. (ii) Calculate the theoretical percentage composition of CuSO4•nH2O by mass of water.

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.