The semi-precious stone turquoise is a hydrate and with the chemical formula CuAl6(PO4)+(OH):"4 H2O. a) How many aluminum atoms are in one formula unit of the hydrate? b) How many oxygen atoms are in one formula unit of the hydrate? c) What is the molar mass of the hydrate? d) What is the mass percent of aluminum in the hydrate? e) What is the mass percent of oxygen in the hydrate? f) What is the mass percent of water in the hydrate?

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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.