There has been a chemical spill in a facility. The chemical has been identified to be a volatile organic

solvent. The facility has a ventilation system with a constant flow rate of 12,000 [m^3/min].

And 2 [mg/m^3] of benzene has been detected in the ventilation outlet.

The air inlet has zero benzene concentration and the indoor air is very well mixed.

What is the generation rate of the organic solvent in the lab [kg/h]?