![shainaanderson24](/avatars/10543.jpg)
shainaanderson24
19.09.2019 •
Chemistry
The decomposition of a to b is a first-order reaction with a half-life of 14.2 min: a → 2b if the initial concentration of a is 0.304 m, how long will it take for the concentration of a to decrease by 43.0 %?
Solved
Show answers
More tips
- H Health and Medicine Heartburn: Causes and Ways to Get Rid of It...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- H Health and Medicine Relieving Swelling in Legs: Causes and Ways to Alleviate the Symptom...
- W Work and Career Мерчендайзинг – все, что нужно знать...
- O Other Everything You Need to Know About Kudyabliks...
- F Food and Cooking How to cook crayfish? Everything you need to know...
- F Food and Cooking Homemade kvass: recipe and brewing process...
- H Health and Medicine How to Choose the Right Tanning Cream?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- S Sport Running: How to Do It Right?...
Answers on questions: Chemistry
- C Chemistry Type in the maximum number of electrons that can be present in each shell or subshell below. n = 5 shell: n = 2 shell: n = 2, l = 0 subshell: n = 2, l = 1 subshell: 3d subshell:...
- C Chemistry When does long-term carbon cycling occur? Select all that apply. A: Carbon stored in an organism is released when it dies. B: Plants and animals break down food and make...
- C Chemistry Which has more thermal energy, a boiling pot of water or an iceberg?” Below you can see each student’s argument...
- C Chemistry 3.05 Acids and Bases Questions Answer the following questions. 1. Explain an acid. 2. Explain a base. 3. List 4 common examples of acids. 4. List 4 common examples of bases....
- C Chemistry Using the picture below, what would the density of there irregularly shaped object be? Sink or float?...
- C Chemistry Write the formula for calcium chloride...
- C Chemistry The loss of one or more electrons from an atom is called a. oxidation c. electrochemistry b. reduction d. half-reaction...
- C Chemistry Name: periodicatomic radius1. does atomic radius increase or decrease as you go down a group/family on the periodic table? 2. what causes this trend? 3. does atomic radius...
- C Chemistry Add me if your 12-14...
- C Chemistry How far was a hotel from a 5.6 ft tall victim, if the shooter took a shot from a hotel balcony that was 221 ft high, and at an angle of elevation that was 57º from the victim?...
Ответ:
It take 16.9 min for the concentration of A to decrease by 43.0 %
Explanation:
The first-order reaction law is![Ln [A] = -k.t + Ln [A]_{0}](/tpl/images/0243/4301/30b90.png)
And the half-life time for the first-order reaction is![t_{1/2} =\frac{Ln 2}{k}](/tpl/images/0243/4301/0d287.png)
- [A] is the concentration of the reactant at any time (t) of the reaction
- [A]0 is the concentration of the reactant at the beginning of the reaction
- k is the rate constant.
- t1/2 is the half-life time
Thus, for this reaction k is
Decreasing the concentration of the reactant by 43.0% means the concentration of A (reactant) at the end of the reaction has to be:
Replacing [A] in the equation of the law
Clearing the t
Replaicing with [A]0 = 0.304M and k = 0.05min-1
Ответ:
no por qué el cuerpo es muy débil
Explanation:
cómo los murciélagos muchos son muy agresivos y eyos resisten