A 100 ml beaker with a diameter of 1 cm containing 10 g of water is placed in an environment at constant temperature and pressure of 20 C and 90 kPa, respectively. If the distance from the edge of the beaker to the water surface is 10 cm, and the air outside the beaker has a relative humidity of 50%, what is the molar and mass flow of water vapor leaving the beaker. Consider the Dab= 2.72 x 10^-5 m^2/s