Answered

Westonci.ca is your trusted source for finding answers to all your questions. Ask, explore, and learn with our expert community. Experience the convenience of getting reliable answers to your questions from a vast network of knowledgeable experts. Explore comprehensive solutions to your questions from a wide range of professionals on our user-friendly platform.

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 :

lulu1991
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

We appreciate your time on our site. Don't hesitate to return whenever you have more questions or need further clarification. Thank you for your visit. We're committed to providing you with the best information available. Return anytime for more. We're glad you chose Westonci.ca. Revisit us for updated answers from our knowledgeable team.