Write balanced equations for each of the following reactions.(a) When mercury(II) oxide is heated, it decomposesto form O2 and mercury metal. (b) When copper(II) nitrateis heated strongly, it decomposes to form copper(II) oxide,nitrogen dioxide, and oxygen. (c) Lead(II) sulfide, PbS(s),reacts with ozone to form PbSO4(s) and O2(g). (d) Whenheated in air, ZnS(s) is converted to ZnO. (e) Potassiumperoxide reacts with CO2(g) to give potassium carbonateand O2. (f) Oxygen is converted to ozone in the upperatmosphere.

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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.