HomeworkLib
Question

1a ) The reaction 2 A → B + C is first order in A. A...

1a ) The reaction 2 A → B + C is first order in A. A time lapse of 180 s was required for the concentration of A to drop from an initial value of 1.5 x 10-2 M to 2.5 x 10-3 M. How much additional time, in s, is required for [A] to decrease further to 1.0 x 10-4 M?

  • A.

    500

  • B.

    320

  • C. 750

  • D.

    360

  • E.

    180

1b) For a reaction that proceeds by the following two-step mechanism

A2 ⇄ 2A (fast)

A + B → C (slow)

Which of the following statements is/are correct?

1)   The reaction is first order in the concentration of A2.

2)   B is a reaction intermediate.

3)   The rate-determining step is bimolecular.

4)   The units of the specific rate constant are mol1/2L-1/2s-1

  • A.

    2 only

  • B.

    2 & 3 only

  • C.

    1 & 4 only

  • D.

    3 only

  • E.

    1 & 3 only

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
1a ) The reaction 2 A → B + C is first order in A. A...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • For a reaction that proceeds by the following two-step mechanism A2 ⇄ 2A (fast) A +...

    For a reaction that proceeds by the following two-step mechanism A2 ⇄ 2A (fast) A + B → C (slow) Which of the following statements is/are correct? 1)   The reaction is first order in the concentration of A2. 2)   B is a reaction intermediate. 3)   The rate-determining step is bimolecular. 4)   The units of the specific rate constant are mol1/2L-1/2s-1

  • Question 4 of 10 For a reaction that proceeds by the following two-step mechanism A2 =2A...

    Question 4 of 10 For a reaction that proceeds by the following two-step mechanism A2 =2A (fast) A+B-C (slow) Which of the following statements is/are correct? 1) The reaction is first order in the concentration of Az. 2) B is a reaction intermediate. 3) The rate-determining step is bimolecular. 4) The units of the specific rate constant are mol1/2_-1/2-1 O A. 1 & 3 only B. 2 only C. 3 only OD. 1 & 4 only O E.2 & 3...

  • The reaction A → B + C is known to be first order in A. Below...

    The reaction A → B + C is known to be first order in A. Below are data showing the concentration of A as a function of reaction time. Time, h [A], M 0 2.50 x 10^-1 1 2.21 x 10^-1 2 1.95 x 10^-1 4 1.52 x 10^-1 8 9.23 x 10^-2 10 7.19 x 10^-2 12 5.61 x 10^-2 (a) What is the average rate of reaction between 1 and 4 h? Report the units as well as...

  • The reaction A → B + C is known to be first order in A. Below...

    The reaction A → B + C is known to be first order in A. Below are data showing the concentration of A as a function of reaction time. Time, h [A], M 0 1.00*10^-1 0.5 9.01*10^-2 1 8.12*10^-2 2 6.60*10^-2 4 4.35*10^-2 5 3.53*10^-2 6 2.87*10^-2 (a) What is the average rate of reaction between 0.5 and 2 h? Report the units as well as the numbers. (b) Plot the data above, showing the concentration of A as a...

  • 1. A reaction is second order in[A] and second-order in [B]: Rate,=K[A]^2[B]^2. what are the units...

    1. A reaction is second order in[A] and second-order in [B]: Rate,=K[A]^2[B]^2. what are the units of k for this reaction? If the concentration of air decreases by a factor of 2 and the concentration of b increases by a factor of 5 what happens to the rate? 2. for the forward reaction 2NO+Cl2=>2NOCl. determine the rate(m/s)for experiment #4 given [NO]°(M)=0.40M and [Cl2]°z(M)=0?20M. Rate? 3.The following data were collected over time for the forward reaction 2NO2=>2NO+O2 ( 1/[NO2]=100 at 0...

  • 1a) The decomposition of hydrogen peroxide is first order in [H2O2]. After 60 min the [H2O2]...

    1a) The decomposition of hydrogen peroxide is first order in [H2O2]. After 60 min the [H2O2] has fallen from 3.7 M to 3.4 M. The rate constant k, in min-1 , is A. 1.4 X 10-3 B. 6.1 X 10-4 C. 2.7 X 10-2 D. 8.3 X 10-3 E. 1.2 x 10-2 1b) What is the half-life, in seconds, of a first order reaction if 30% of the reactant has decomposed in 50 seconds? A. 50 B. 83 C. 26...

  • Question 3 1 pts The rate constant, k, of the first order reaction A B +C...

    Question 3 1 pts The rate constant, k, of the first order reaction A B +C is k = 8.62 x 10-35-1. If the initial concentration of A is 2.74 M, how long will it take for the concentration of A to fall below 0.32 M? Give your answer to one decimal place in MINUTES (do not input the units). For example, if your answer is 8.956 minutes, enter 9.0 Question 4 1 pts The rate constant, k, of the...

  • The reaction 2A + 3B → C is first order with respect to A and B....

    The reaction 2A + 3B → C is first order with respect to A and B. When the initial concentrations are [A] 1.55 x 10 2 M and [B] 2.11 × 10-3 M, the rate is 2.65 x 10 4 M. Calculate the rate constant or the reaction. Enter your answer in scientific notation. 10 O M ● M-1 M1.s1

  • Suppose the reaction A <---> B in the forward direction is first order in A and...

    Suppose the reaction A <---> B in the forward direction is first order in A and the rate constant is 1.50 x 10-2s-1. The reverse reaction is first order in B and the rate constant is 4.50 x 10-2s-1 at the same temperature. What is the value of the equilibrium constant for the reaction A <---> B at this temperture?

  • The reaction A(aq) → B(aq) is a first order reaction. If it takes 300.0 seconds for...

    The reaction A(aq) → B(aq) is a first order reaction. If it takes 300.0 seconds for the concentration of A to decrease in concentration from 0.50 M to 0.010 M, what is the rate constant for this reaction? 57 s-1 1.5 x 10-2 s-1 1.3 x 10-2 s-1 1.6 x 10-3 s-1 1.8 x 10-2

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT