1) First order reaction: A ---> Products, where 25% of Adisappears in 24 seconds. What is the half life of this reaction?
2) The 1st-order rate constant K = 3.4 x 10-3*s-1 for the decompositions of cyclobutane cyclobutane -----> 2(ethylene), with half life is 204 seconds. What fraction of a sample of cyclobutane remains after 612 second sunder the specified conditions?