I want the answer very clear and correct please with mol/L.s. Thank you The half-life of...

Question

Question

I want the answer very clear and correct please with mol/L.s. Thank you

Answer 1

Answer #1

Ao = 0.500 M

t1/2 = 3.15 sec

K = ?

formula for rate constant = k = Ao / 2 t_1/2

k = 0.500 / 2 x 3.15

k = 0.0794 mol /L s ------------------> answer

Add a comment

Answer 2

Similar Homework Help Questions

55) The rate constant for a first-order reaction is 0.54 s-1. What is the half-life of...

55) The rate constant for a first-order reaction is 0.54 s-1. What is the half-life of this reaction if the initial concentration is 0.33 M? 56) The rate constant for a zero-order reaction is 0.54 s-1. What is the half-life of this reaction if the initial concentration is 0.33 M? 57) The reaction that occurs in a Breathalyzer, a device used to determine the alcohol level in a person's bloodstream, is given below. If the rate of appearance of Cr2(SO4)3...
I need help on this chemistry half life problem. please help!! The half-life for a second...

I need help on this chemistry half life problem. please help!! The half-life for a second order reaction is 50 sec. The time needed for the concentration of the reactant to decrease to one-fourth of its original value is: 19. a) 50 sec b) 100 sec c) 150 sec d) 75 sec e) 200 sec
2. Answer the following questions by connecting the half-life of each first-order reaction to the rate...

2. Answer the following questions by connecting the half-life of each first-order reaction to the rate constant. a. The rate constant of a first-order reaction is 2.43 × 10–2 min–1. What is the half-life of the reaction? (2 points) b. A first-order reaction has a rate constant of 0.547 min-1. How long will it take a reactant concentration 0.14 M to decrease to 0.07 M? (2 points) c. The half-life of a first-order reaction is 5.47 min. What is the...

Perform Rate Calculations Using Half Life Question The first order reaction 3A 2BChas rate constant 0.538...

Perform Rate Calculations Using Half Life Question The first order reaction 3A 2BChas rate constant 0.538 s1, If the initial concentration of A is 0.867 mol L-1, what is the half-life of the reaction, in seconds? Remember to use correct significant figures in your answer. Provide your answer below: FEEDBACKMORE INSTRUCTION SUBMIT Content attribution
please help explain this to me step by step, thank you so much! A reactant decomposes...

please help explain this to me step by step, thank you so much! A reactant decomposes with a half-life of 15.7 s when its initial concentration is 0.491 M. When the initial concentration is 2.67 M, this same reactant decomposes with a half-life of 85.5 s. What is the order of the reaction? What is the value and unit of the rate constant for this reaction? Unit: 0 M-s-1 k=11 4.4 ×10
+ Half-life for First and Second Order Reactions 11 of 11 The half-life of a reaction,...

+ Half-life for First and Second Order Reactions 11 of 11 The half-life of a reaction, t1/2, is the time it takes for the reactant concentration A to decrease by half. For example, after one half-Me the concentration falls from the initial concentration (Alo to A\o/2, after a second half-life to Alo/4 after a third half-life to A./8, and so on. on Review Constants Periodic Table 11/25 For a second-order reaction, the half-life depends on the rate constant and the...

The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A]...

The half-life of a reaction, t1/2, is the time it takes for the reactant concentration [A] to decrease by half. For example, after one half-life the concentration falls from the initial concentration [A]0 to [A]0/2, after a second half-life to [A]0/4, after a third half-life to [A]0/8, and so on. on. For a first-order reaction, the half-life is constant. It depends only on the rate constant k and not on the reactant concentration. It is expressed as t1/2=0.693k For a...
At 25°C the half-life for the first-order decomposition of a pesticide solution is 15.0 hrs. (a)...

At 25°C the half-life for the first-order decomposition of a pesticide solution is 15.0 hrs. (a) Calculate the rate constant for the reaction. (b) If the starting concentration of pesticide is 0.500 M, what concentration will remain after 120 min at 25°C? neat handwriting, please!
I need help with a. b. c. and d. please. thank you 54. This reaction was...

I need help with a. b. c. and d. please. thank you 54. This reaction was monitored as a function of time: AB —— A + B A plot of 1/[AB] versus time yields a straight line with a slope of +0.55/M.s. a. What is the value of the rate constant (k) for this reaction at this temperature? b. Write the rate law for the reaction. c. What is the half-life when the initial concentration is 0.55 M? d. If...

show all work please 3) What is the half-life for the decomposition of NOCI when the...

show all work please 3) What is the half-life for the decomposition of NOCI when the concentration of NOCI is 0.15 M? The rate constant for this second- order reaction is 8.0 x 10-8 L/mol/s.