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# Given the following reaction: 2 NO(g) + O 2 (g) <--> 2 NO 2 (g), what is the equilibrium constant (K), if the concentrations at equilibrium are [NO]...

1.Given the following reaction: 2 NO(g) + O2(g) <--> 2 NO2(g), what is the equilibrium constant (K), if the concentrations at equilibrium are [NO] = 0.0542 M, [O2] = 0.127 M, and [NO2] = 15.5 M?

K = 2.54 x 10-1

K = 6.44 x 105

K = 2.35 x 102

K = 3.4 x 103

2.The following reaction: HF(aq) <--> H+(aq) + F-(aq) has an equilbirum constant (K) value of 7.2 x 10-4. This means that the reaction proceeds essentially to completion.

True

False

3.Carbonyl chloride, also called phosgene, was used in World War 1 as a poisonous gas. The equilibrium concentrations for the reaction between carbon dioxide and molecular chlorine to form carbonyl chloride

CO(g) + Cl2(g) <--> CoCl2(g)

are [CO] = 1.2 x 10-2 M, [Cl2] = 0.054 M, and [CoCl2] = 0.14 M. Calculate the equilibrium constant (K).

K = 6.23 x 102

K = 216

K = 4.63 x 10-3

K = 2.56

4.The equilibrium constant for the following equation:

PCl5(g) <--> PCl3(g) + Cl2(g) is 1.05 at 250 degrees Celsius. If the equilibrium partial pressures of PCl5 and PCl3 are 0.875 atm and 0.463 atm respectively, what is the equilibrium partial pressure of Cl2?

1.98 atm

0.463 atm

1.05 atm

0.054 atm

Given the reaction

2 HI(g) <--> H2(g) + I2(g)

At 430 degrees Celsius, the equilibrium concentrations are [HI] = .5M, [H2] = 0.5 M, and [I2] = 1.5 M. What is the equilibrium constant (K)?

K = 0.67

K = 1.5

K = 0.33

K = 3

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