Physical Chemistry

4. A container with volume 1L, contains CO gas and a sample of a solid catalyst suddenly placed into container at 25C. (a) If the total surface area of catayst is 0.01m2, if the initial rate of collision of CO molecules with catalyst surface is 6.01021s1, find initial pressure of CO. (b) If every molecule that strikes the surface reacts on the catalyst surface, how long will it take for pressure of CO to drop to 50% of its inital value