A drum contains \(0.16 \mathrm{~m}^{3}\) of toluene. If the lid is left open (lid diameter is \(0.92 \mathrm{~m}\) ), determine the

a. Time required to evaporate all of the toluene.

b. Concentration of toluene (in ppm) near the drum if the local ventilation rate is \(28.34 \mathrm{~m}^{3} / \mathrm{min}\). The temperature is \(30^{\circ} \mathrm{C}\) and the pressure is \(1 \mathrm{~atm}\).