Consider this reaction. 2A B It obeys the rate law: rate = k [A] 2 and k = 0.188 M -1 s -1 If the initial concentration of A is 0.600 M, at what time will the concentration be 50.0% of that value? Consider this reaction. 2A B It obeys the rate law: rate = k [A] 2 and k = 0.188 M -1s -1 If the initial concentration of A is 0.600 M, at what time will the concentration be 50.0% of that value? 793 s 8.87 s 182 s 9.48 x 103 s 79.1 s 3.07 x 10-3 s 1.50 x 109 s 5.22 x 10-2 s

The following reaction has rate law r = k[C4H6] 2 , where k = 0.014 M-1 s -1 What is the concentration of C4H6 (in M) after 3.0 hours, if [C4H6]o = 0.025 M? A. 0.0052 M B. 0.024 M C. 0.012 M D. 0.0060 M

Some measurements of the initial rate of a certain reaction are given in the table below. [N₂] [H₂] initial rate of reaction 1.55M 0.638M 14.0M/s 0.601 M 0.638M 2.10M/s 1.55M 1.92M 127.M/s Use this information to write a rate law for this reaction, and calculate the value of the rate constant k. Round your value for the rate constant to 3 significant digits. Also be sure your answer has the correct unit symbol. rate = k k = 0 ▬ x10 X 00 5

Consider the reaction 2 A + B → C. What is the rate law given the following experimental data? [A], M 0.180 [B], M 0.250 0.180 0.500 0.720 0.500 A. rate = [A]²[B]² ✓B. rate = [A]¹[B]¹ C. rate = [A]²[B]¹ D. rate = [A]¹[B]² rate, M/s 1.36 x 10 2.72 x 10-3 1.09 x 10-2

Some measurements of the initial rate of a certain reaction are given in the table below. [N₂] [H₂] initial rate of reaction 1.84M 2.20M 28.0M/s 0.689M 2.20M 3.93 M/s 1.84M 11.0M 700. M/s Use this information to write a rate law for this reaction, and calculate the value of the rate constant k. Round your value for the rate constant to 3 significant digits. Also be sure your answer has the correct unit symbol. rate = k ☐x10 k = 0 × ? Ś

2. What is the rate law for the theoretical reaction 2 A + B C + 2 D? a. rate = K[A]² [B] b. It is impossible to determine from this information. c. rate= K[C][D]² d. rate = k[A][B]

If the rate law for a reaction is rate = k[A]2[B], what is the effect on the overall rate of doubling the concentration of B? a. rate increases by 2 b. rate increases by 4 c. rate increases by 16 d. no effect on the rate

The reaction C₂H₂(g) → 2C₂H₂(g) - has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, k, is 6.1 x 10-8 s-1. What is the value of the rate constant at 820.0 K? k = 9.42 X10-26 Incorrect S-1

A certain chemical reaction 2A → B + C is proposed to occur in three elementary steps:    Step 1:   A  ⇌  B + D   (fast)    Step 2:   D  ⇌  E   (slow)    Step 3:   A + E  →  C   (fast) Which one of the following rate laws is consistent with the proposed mechanism?   A.  Rate = k[A][B]–1   B.  Rate = k[A]2   C.  Rate = k[A]3[B]–1   D.  Rate = k[A]2[B]–1   E.  Rate = k[A]