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practiceexam2

practiceexam2 - 1 The rate of formation of oxygen in the...

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1. The rate of formation of oxygen in the reaction 2N 2 O 5 (g) ' 4NO 2 (g) + O 2 (g) is 2.28 (mol O 2 ) @ L —1 @ s —1 . What is the rate at which N 2 O 5 is used? __ A. 1.14 (mol N 2 O 5 ) @ L —1 @ s —1 __ B. 0.57 (mol N 2 O 5 ) @ L —1 @ s —1 __ C. 4.56 (mol N 2 O 5 ) @ L —1 @ s —1 __ D. 2.28 (mol N 2 O 5 ) @ L —1 @ s —1 __ E. 9.12 (mol N 2 O 5 ) @ L —1 @ s —1 2. Given: 2NO 2 (g) + F 2 (g) ' 2NO 2 F(g) rate = — [F 2 ]/ t The rate of the reaction can also be expressed as __ A. 1/2 [NO 2 ]/ t __ B. [NO 2 F]/ t __ C. 1/2 [NO 2 F]/ t __ D. —2 [NO 2 ]/ t __ E. [NO 2 ]/ t 3. Given: 2N 2 O 5 (g) ' 4NO 2 (g) + O 2 (g) rate = k [N 2 O 5 ] The overall order of the reaction is __ A. 7 __ B. 2 __ C. 0 __ D. 3 __ E. 1 4. Given: 2A(g) + B(g) ' C(g) + D(g) When [A] = [B] = 0.10 M, the rate is 2.0 M @ s —1 ; for [A] = [B] = 0.20 M, the rate is 8.0 M @ s —1 ; and for [A] = 0.10 M, [B] = 0.20 M, the rate is 2.0 M @ s —1 . The order of the reaction is __ A. 2 __ B. 4 __ C. 1 __ D. 1.5 __ E. 0 1

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5. For the reaction 2A + B ' products determine the overall order of the reaction given the following data: Initial Concentration, M Initial Rate, [email protected] —1 A B 0.10 0.10 2.0 > 10 —2 0.20 0.10 8.0 > 10 —2 0.30 0.10 1.8 > 10 —1 0.20 0.20 8.0 > 10 —2 0.30 0.30 1.8 > 10 —1 __ A. 0 __ B. 3 __ C. 1.5 __ D. 1 __ E. 2 6. For the reaction 2A + B ' products determine the overall order of the reaction given the following data: Initial Concentration, M Initial Rate, [email protected] —1 A B 0.10 0.10 2.0 > 10 —2 0.20 0.10 8.0 > 10 —2 0.30 0.10 1.8 > 10 —1 0.20 0.20 8.0 > 10 —2 0.30 0.30 1.8 > 10 —1 __ A. 0 __ B. 3 __ C. 1.5 __ D. 1 __ E. 2 7. The reaction 2NO(g) + 2H 2 (g) ' N 2 (g) + 2H 2 O(g) is first-order in H 2 and second-order in NO. Starting with equal concentrations of H 2 and NO, the rate after 50% of the H 2 has reacted is what percent of the initial rate? __ A. 12.5% __ B. 25.0% __ C. 37.5% __ D. 18.8% __ E. 50.0% 2
8. For the reaction C 2 H 6 (g) ' 2CH 3 (g) rate = k [C 2 H 6 ] If k = 5.50 > 10 —4 s —1 and [C 2 H 6 ] initial = 0.0200 M, calculate the rate of reaction after 1 hour.

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practiceexam2 - 1 The rate of formation of oxygen in the...

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