4. Each month the Speedy Dry Cleaning Company buys 1 barrel (0.160 m³) of dry cleaning fluid. Ninety percent of the fluid is lost to the atmosphere and 10% remains as residue to be disposed of. The density of the dry cleaning fluid is 1.5940 g/mL Draw a mass balance diagram and estimate the monthly mass emission rate to the atmosphere in kg/mo.

Fig: 1