Explanation Concept Introduction: The mole is the SI unit for the amount of substance. It is denoted by mol. According to International Bureau of Weights and Measures, mole is defined as, the amount of substance of a system which contains the same number of constitutive entities (example: atoms, molecules, electron, photon…) as atom in 0 .012 kilograms of carbon-12 isotope. A mole is 6 .022 × 10 23 of anything. 6 .022 × 10 23 Is known as Avogadro number. Molecular mass is the mass obtained by the addition of relative atomic mass of elements present in the corresponding compound. Through decomposition of KClO 3 small amount of oxygen can be prepared in laboratory. Mole ratios between the reactant and a product of a reaction are depends upon the coefficients of reactant and product in a balanced chemical equation. The given mass of KClO 3 is 122.55 g. The molar mass of KClO 3 is 122.55 g. So the number of moles can be calculated by using the following equation, Number of moles = Given mass Molar mass The number of moles in 122 .55 g of KClO 3 = 122 .55 g 122 .55 g/mol = 1 mole The given reaction is, 2KClO 3 (s) → 2KCl (s) + 3O 2(g) To find the number of moles of oxygen from the given reaction equation mole ratio between KClO 3 and O 2 is used

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Chapter 17, Problem 36TAS

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The mass of oxygen produced when 122.55 g of KClO3 takes parts in the given reaction should be determined.

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Chapter 17, Problem 35TAS

Chapter 17, Problem 37TAS

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The mass of oxygen produced when 122 .55 g of KClO 3 takes parts in the given reaction should be determined.

Solution Summary: The author explains that the mole is the SI unit for the amount of substance. It is denoted by mol.

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The mass of oxygen produced when 122.55 g of KClO3 takes parts in the given reaction should be determined.

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Chapter 17 Solutions