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Quiz 2

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Web Quiz You can login to this page multiple times but you cannot take the quiz more than once. . Submit your answer for grading by Clicking on the "Grade Answers" button at the bottom of the page only when you are sure of your answers. Question # 1 Consider the following equilibrium: 2NOCl( g ) 2NO( g ) + Cl 2 ( g ) with K =1.6 x 10 -5 mol/L. 1.00 mol of pure NOCl and 1.00 mole of pure Cl 2 are replaced in a 1.00-L container. Calculate the equilibrium concentration of Cl 2 ( g ). A. 1.6 x 10 -5 M B. 1.0 M C. 0.50 M D. 6.2 x 10 -4 M E. 4.0 x 10 -3 M Question # 2 For the equilibrium 2IBr( g ) I 2 ( g ) + Br 2 ( g ), K c = 8.5 x 10 -3 at 150°C. If 0.040 mol of IBr is placed in a 1.0-L container, what is the concentration of this substance after equilibrium is reached? A. 0.0 M B. 0.016 M C. 0.020 M D. 0.025 M E. 0.034 M Question # 3 The following question refers to a system of four gases (each initially 2 mol samples) combined in a 2-liter bottle. The equilibrium is shown here: A + B C + D (K=2.6) Which of the following statements is correct? A. The system is in equilibrium with the initial concentrations. B. The equilibrium lies to the left. C. The concentration of the reactants and the products will be equal at equilibrium. D. The equilibrium lies to the right. E. The initial concentrations of the products do not equal the initial concentrations of the reactants. Question # 4

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The reaction H 2 ( g ) + I 2 ( g ) 2HI( g ) has K p = 45.9 at 763 K. A particular equilibrium mixture at that temperature contains gaseous HI at a partial pressure of 4.00 atm and hydrogen gas at a partial pressure of 0.200 atm. What is the total pressure of the system at equilibrium? (Enter answer as number (0.1234) or as exponential form (1.234e-1 or 1.234E-1)
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