Atank with its top open to the atmosphere contains liquid methanol (meoh, molecular weight 32 g/mol) at the bottom of the tank. the tank is maintained at 30 c. the diameter of the cylindrical tank is 1.0 m, the total height of the tank is 3.0 m, and the liquid level at the bottom of the tank is maintained at 0.5 m. the gas space inside the tank is stagnant and the meoh vapors are immediately dispersed once they exit the tank. at 30 c, the vapor pressure exerted by liquid meoh is 163 mmhg. we are concerned that this open tank may be emitting a considerable amount of meoh vapor. what is the diffusivity coefficient of meoh in air at 30 c and 1atm?