Compound Y contains lead and oxygen only. 15.0 g of Y was found to contain 12.99 g lead. Find out the empirical formula of Y. (Relative atomic mass: Pb = 207.2, O = 16.0) (a) Calculate the mass of oxygen present in 15.0 g Y. (b) Hence, find out the empirical formula of the oxide.

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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.