111. Solving a chemistry problem

49. The reaction of the interaction of acetic anhydride with water is a first order reaction (15 ° C): (CH3CO) 2O H2O \u003d 2CH3COOH. At the initial time, the solution contained 0.892 mol of acetic anhydride, and after 1.5 minutes its amount decreased to 0.481 mol. Calculate the rate constant, the half-life, the initial reaction rate, and the reaction rate at the time equal to the half-life.