Q1. If you have the cylinder which contains 2% NO in air, what is the concentration of NO in ppm? Answer: 20,000 ppm Q2. (a) Does 1 μg/cm³ SO2 equal to 1 ppm SO2 at 25°C at ? Answer: NO (b) Does the ppm of 1 μg/cm³ SO2 at 25°C equal to the ppm of 1 μg/cm³ SO2 at 125°C? Answer: Yes (explain) Q3. What is the volume of occupied by one mole of ideal gas at 80 °F and 1 atm? Answer: 24.6 L Q4. The ozone concentration is 0.11 ppm at 25 °C and 1 atm. What is the concentration in μg/m³ at the same condition? Answer: 216 μg Q5. Liquid Toluene is volatilized 0.1 g/min into the air stream at 10 feet/min through 10 inch diameter conduit. What is the concentration of toluene in ppm. P=1atm and T = 298K Answer: 172 ppm