The desorption of a single molecular layer of n-butane from a single crystal of aluminum oxide was found to be first order with a rate constant of 0.128/s at 150 K. Part A What is the half-life of the desorption reaction? t1/ 5.41 s Submit Previous Answers v Correct Part B If the surface is initially completely covered with n-butane at 150 K, how long will it take for 25% of the molecules to desorb? Express your answer using two significant figures. t = 2.2 s Submit Previous Answers v Correct Part C For 50% to desorb? Express your answer using two significant figures. t = 5.4 s Submit Previous Answers v Correct Part D If the surface is initially completely covered, what fraction will remain covered after 14 s ? Express your answer using two significant figures. Π ΑΣ φ. 0.17 Submit Previous Answers Request Answer x Incorrect; Try Again; 3 attempts remaining Part E After 20 s ? Express your answer using two significant figures. ΗΑΣΦ |0.077 %

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Photochemistry

Photochemistry is the part of chemistry that studies the various mechanisms of reactions that are triggered by the presence of light energy. It also helps to study the changes involved in a molecule that can undergo the absorption of radiation.