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Author Question: A first-order reaction is 40.0% complete at the end of 40.4 minutes. What is the value of the rate ... (Read 83 times)

washai

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on: Mar 21, 2021

Question 1

A chemical reaction that is first order in X is observed to have a rate constant of 1.9 × 10–2s–1. If the initial concentration of X is 1.0 M, what is the concentration of X after 170 s?

◦ 25 M
◦ 0.68 M
◦ 0.24 M
◦ 0.96 M
◦ 0.040 M

Question 2

A first-order reaction is 40.0% complete at the end of 40.4 minutes. What is the value of the rate constant (in min–1)?

◦ 2.27 × 10–2
◦ 1.26 × 10–2
◦ 79.1
◦ 44.1
◦ None of these are correct.
Chemistry: An Atoms First Approach ¦ Zumdahl, DeCoste ¦ 3rd Edition
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Marked as best answer by washai on Mar 21, 2021

Shshxj

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Reply #1 on: Mar 21, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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washai

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Reply 2 on: Mar 21, 2021
Gracias!

frankwu0507

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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