A certain gas mixture flows out of a reactor vessel and through a section of smooth, horizontal pipe that has a 3.8cm inner diameter. The gas pressure drop along a 5.4m length of pipe is measured to be 350Pa. At the conditions of interest, the gas density is 0.89kg/m3 and its viscosity is 4.1105Pas. What is its steady mass flow rate (in [kg/s] ) through the pipe? The smooth pipe described in Problem 1 develops a crack and must be temporarily replaced by a rougher galvanized iron pipe of the same dimensions. If the pressure drop must remain unchanged, what will be the new mass flow rate of gas (in [kg/s] ) through the pipe