Please help. Please explain and demonstrate. I am not sure where to begin with this. Thank you so much. I do appreciate it.

- Particulate airborne concentrations are expressed in mg/m3 (or ug/m3). By convention, mg/m3 units are not generally used for gases and vapors. For gases and vapors, the conversion between ppm v/v and milligrams of gas per cubic meter of air is given as: ppmv/v=m3mgMW24.45 Where MW= molecular weight of the gas in g/ mole and 24.45 represents the volume of a mole of gas at NTP in liters/mole (MW is in Appendix B of the textbook or Google) Why is the conversion between mg/m3 and ppm important? You need to know how to convert between the two (if nothing more than for this week's homework). While the OSHA exposure limits (permissible exposure limits [PELs]) are listed in both (see OSHA Annotated Table Z-1 (3), the lab results may come in mg/m3 and you may need to convert (and it's on your homework). - A charcoal tube is sent to the lab for benzene analysis after having sampled a volume of air of 24.0 liters (.2 liters per minute for 120 minutes). The lab produced a result of 0.03mg benzene. Determine the concentration so these results can be compared to a PEL. Concentration=volumeofairweightofcontaminantConcentration=24.0L(air)0.03mg(benzene)Concentration=0.00125mg/Lor1.25mg/m3 If the PEL for benzene is listed as 1ppm, how will you convert