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# Test%20#2%20Form%20A%20answers - Form A 1 At some time the...

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Form A 1. At some time, the rate of formation of C is observed to be 0.036 mol/L per second for the reaction below. 2A + 3B à 4C + 2D In order, what is the rate of change of A, the rate of change of B, and the rate of change of D (all given in mol/L per second)? a. -0.009, -0.018, 0.027 b. -0.018, -0.027, 0.018 c. -0.072, -0.048, 0.072 d. -0.036, -0.036, 0.036 2. Stilbene exists in two confirmations, cis-stilbene and trans-stilbene. For the reaction where cis becomes trans, K c is 24.0 at 200 C. Initially there is only 0.850 M cis-stilbene. What is the equilibrium concentration of trans-stilbene? Cis-stilbene à trans-stilbene 3. The reaction A + B à C has a reaction rate which is experimentally observed to follow the relationship Rate=k[A] 2 [B]. The overall order of the reaction is 4. The units of the reaction rate constant, k, for a second order reaction are ____________. 5. Which of the following statements is FALSE? a. The reaction rate for a zero-order reaction is independent of concentrations. b. The rate constant for a second order reaction is dependent on temperature. c. The rate law expression relates rate and concentration. d. The integrated rate law relates rate and time.

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6. Given the following potential energy diagram for the reaction X + Y à Z + R The arrow "d" represents the 7. Given the following data for the NH 4 + + NO 2 - à N 2 + 2H 2 O reaction, the rate law for the reaction is Trial [NH 4 + ] [NO 2 - ] Rate 1 0.010 M 0.020 M 0.020 M/s 2 0.015 M 0.020 M 0.030 M/s 3 0.010 M 0.010 M 0.005 M/s a. rate= k[NH 4 + ][NO 2 - ] b. rate =k[NH 4 + ] 2 [NO 2 - ] c. rate=k[NH 4 + ][NO 2 - ] 2 d. rate=k[NH 4 + ] 2 [NO 2 - ] 2
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