As a result of a chemical spill, benzene is evaporating

As a result of a chemical spill, benzene is evaporating at the rate of 1 gram per minute into a room that is 6m x 6m x 3 m in size and has a ventilation rate of 10m 3 /min. Compute the steady-state concentration of benzene in the room. Assuming the air in the room is initially free of benzene, compute the time necessary for benzene to reach 95 percent of the steady-state concentration


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