More objective 8-10 Practice 8. For the reaction: 4 PHP + 6H₂ The half life is 20.0 seconds. The rate law is first order. a. calculate k (Answer: k=0.0347 s-1) b. how long does it take for 75% of the initial concentration of PH3 to disappear? (Answer: 40. seconds) c. How long does it take for 95% of the initial concentration of PH3 to disappear? (Answer: 86 seconds) d. The half life of a first order reaction, A→ B, is 20. seconds. How much time in seconds would be required for the concentration of A to fall from 3.0 M to 1.0 M ?(Answer: 31 s)
More objective 8-10 Practice 8. For the reaction: 4 PHP + 6H₂ The half life is 20.0 seconds. The rate law is first order. a. calculate k (Answer: k=0.0347 s-1) b. how long does it take for 75% of the initial concentration of PH3 to disappear? (Answer: 40. seconds) c. How long does it take for 95% of the initial concentration of PH3 to disappear? (Answer: 86 seconds) d. The half life of a first order reaction, A→ B, is 20. seconds. How much time in seconds would be required for the concentration of A to fall from 3.0 M to 1.0 M ?(Answer: 31 s)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Chem q 7
Transcribed Image Text:More objective 8-10 Practice
8. For the reaction:
4 PH₂ → P₂ + 6H₂
The half life is 20.0 seconds. The rate law is first order.
a. calculate k (Answer: k-0.0347 S-¹)
b. how long does it take for 75% of the initial concentration of PH3 to
disappear? (Answer: 40. seconds)
c. How long does it take for 95% of the initial concentration of PH3 to
disappear? (Answer: 86 seconds)
d. The half life of a first order reaction, A→ B, is 20. seconds. How much
time in seconds would be required for the concentration of A to fall from
3.0 M to 1.0 M ?(Answer: 31 s)
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