The pressure at which 95 % of the Oxygen molecules dissociate is to be calculated. Concept introduction: The equilibrium constant K describes the ratio of the reactant to the product on the equilibrium conditions in terms of molar concentration. The equilibrium constant depends upon temperature. Law of mass action is applicable on the equilibrium reactions. The Le Chatelier’s principle states that the addition of the reactants shifts the equilibrium to the right while the addition of product shifts the equilibrium to the left at constant temperature. The dissociation of the species is denotes by the symbol α . To determine: The pressure at which 95 % of the Oxygen molecules dissociate at the constant temperature.

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6. Match each of the lettered items in the column on the left with the most appropriate numbered item(s) in the column on the right. Some of the numbered items may be used more than once and some not at all. a. Z = 37 1. b. Mn 2. C. Pr element in period 5 and group 14 element in period 5 and group 15 d. S e. [Rn] 7s¹ f. d block metal 3. highest metallic character of all the elements 4. paramagnetic with 5 unpaired electrons 5. 4f36s2 6. isoelectronic with Ca²+ cation 7. an alkaline metal 8. an f-block element

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Chapter 13, Problem 121CP

Interpretation Introduction

Interpretation: The pressure at which 95% of the Oxygen molecules dissociate is to be calculated.

Concept introduction: The equilibrium constant K describes the ratio of the reactant to the product on the equilibrium conditions in terms of molar concentration.

The equilibrium constant depends upon temperature.

Law of mass action is applicable on the equilibrium reactions.

The Le Chatelier’s principle states that the addition of the reactants shifts the equilibrium to the right while the addition of product shifts the equilibrium to the left at constant temperature.

The dissociation of the species is denotes by the symbol α .

To determine: The pressure at which 95% of the Oxygen molecules dissociate at the constant temperature.

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