what chemical amount of KClO3 is needed to form 2.80L of O2, measured at STP, according to the equation  2KClO3->2KCl+3O2

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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.