A 0.3175 cm sphere of glucose is placed in a water stream flowing at a rate of 0.15 m/s. the temperature of water is 25C. The diffisuvity of glucose in water is 0.69x10-5 cm2 /s. The density and viscosity of water at 25C are 997.1 kg/m3 and 880.637x10-6 Pa s. Determine the mass transfer of coefficient.