{"id":302,"date":"2024-05-10T09:45:28","date_gmt":"2024-05-10T09:45:28","guid":{"rendered":"https:\/\/casestudyhelp.net\/questions\/?p=302"},"modified":"2024-05-10T09:45:28","modified_gmt":"2024-05-10T09:45:28","slug":"a-first-order-reaction-is-75-0-complete-in-320-s-a-what-are-the-first-and-second-half-lives-for-this-reaction","status":"publish","type":"post","link":"https:\/\/casestudyhelp.net\/questions\/a-first-order-reaction-is-75-0-complete-in-320-s-a-what-are-the-first-and-second-half-lives-for-this-reaction\/","title":{"rendered":"A first-order reaction is 75.0% complete in 320. s. a. What are the first and second half-lives for this reaction?"},"content":{"rendered":"<h2>A first-order reaction is 75.0% complete in 320. s. a. What are the first and second half-lives for this reaction?<\/h2>\n<p style=\"background: white;\"><span style=\"font-family: 'Arial','sans-serif'; color: black;\"><strong>Answer:<\/strong> The first and second half-lives for The following formula can be used to calculate this reaction: equation: t1\/2 = 0.693\/k, where k is the rate constant.<\/span><\/p>\n<p style=\"background: white;\"><span style=\"font-family: 'Arial','sans-serif'; color: black;\">Using a rate constant of 0.0022 s-1, the first and second half-lives would be 313.6 s and 627.2 s, respectively. To calculate the time it takes for 90.0% completion, we can use the equation:<\/span><\/p>\n<p style=\"background: white;\"><span style=\"font-family: 'Arial','sans-serif'; color: black;\">t = t1\/2 * ln(0.1\/C), where C is the initial concentration of the reactant.<\/span><\/p>\n<p style=\"background: white;\"><span style=\"font-family: 'Arial','sans-serif'; color: black;\">Using an initial concentration of 1 and the first half-life of 313.6 s, it would take 577 s for 90.0% completion.<\/span><\/p>\n<blockquote><p>Are you stuck with a first-order reaction that is 75.0% complete in 320? Don&#8217;t worry about it. Our professional team of experts will help you with your <span style=\"color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/casestudyhelp.net\/case-study-writing-services.php\"><strong>case study writing services<\/strong><\/a><\/span>. 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