The volume of a dry box (a closed chamber with dry nitrogen flowing through it) is 2.0 m^3. The dry box is maintained at a slight positive gauge pressure of 10 cm H20 and room temperature (25 C). If the contents of the box are to be replaced every five minutes, calculate the required mass flow rate of nitrogen in g/min by (a) direct solution of the ideal gas equation of state and (b) conversion from standard conditions.