Answered

IDNLearn.com makes it easy to find the right answers to your questions. Our platform offers reliable and comprehensive answers to help you make informed decisions quickly and easily.

If it takes 30 seconds for a reactant concentration to decrease from 1.0 M to 0.5 M in a first-order chemical reaction, then what is the rate constant for the reaction? A. 0.033 s^–1 B. 0.046 s^–1 C. 0.023 s^–1 D. 43 s^–1

Sagot :

Lulu1991idn
The answer is A. For a first-order chemical reaction, the rate constant k has a relationship with concentration C as follow: dC/dT=k*C. So in this reaction, (1-0.5)/30=k*0.5. So k=0.033

Answer: 0.023 s^-1

Explanation:

Using the equation: ln(No/N) =kt, we can get k=[ln(No/N)] /t

Thus, k=ln(1/0.5)/30=(ln2)/(30 s) = 0.023 s^-1

Your engagement is important to us. Keep sharing your knowledge and experiences. Let's create a learning environment that is both enjoyable and beneficial. Thank you for choosing IDNLearn.com for your queries. We’re here to provide accurate answers, so visit us again soon.