General Chemistry -Class Test 4

General Chemistry -Class Test 4 - In-Class Test 4 CHM 1301...

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CHM 1301 November 4, 2008 Took this up in DGD on Wednesday! Name: _______________________ Student No. _______________ Givens: Avogadro’s Number: N A = 6.022 x 10 23 units/mol R = 8.314 J/mol K = 0.08206 L atm/mol K 1 atm = 760 mm Hg = 1.01325 x 10 5 Pa = 101.325 kPa 1. Consider the following reaction: POCl 3 (g) º POCl(g) + Cl 2 (g) K c = 0.450 A sample of pure POCl 3 (g) was placed in a reaction vessel and allowed to decompose according to the above reaction. At equilibrium, the concentrations of POCl(g) and Cl 2 (g) were each 0.150 M. What was the initial concentration of POCl 3 (g)? A) 0.225 M B) 0.200 M C) 0.633 M D) 0.483 M E) 0.350 M 2. 4.000 mol chlorine and 2.000 mol bromine were placed in a 50.0 L container and kept at 293 K until equilibrium was achieved for the reaction: Br 2 (l) + Cl 2 (g) º BrCl(g) At the point of equilibrium there were 82.63 g of Br 2 (l). Compute the value of K c for this reaction. A) 0.0699
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General Chemistry -Class Test 4 - In-Class Test 4 CHM 1301...

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