Question

1. 200 ml in 1 m’ is how many PPM? 2. 75 L of vapor in 2000 ft of vapor is how many PPM? 3. What is the partial pressure of SO2 at a concentration of 41000 PPM at STP? 4. If 2 liters of toluene, SpG = .86, GMW = 92.1 g/mole, spills in a room 60ft x 30ft x 15ft, what is the concentration in PPM of toluene present in the room? 5. If 700 ml of perchloroethylene (C2C14), SRG =1.62, spills and completely evaporates in a room 60ft x 30ft x 15ft. What is the concentration of perchloroethylene present in the room? Express the concentration in PPM. 6. What is the % concentration of NO2 at a partial pressure reading of 1.2 in water gauge? 7. How many mg/m3 is a 6% concentration of CO2. MW = C= 12 + 0+0 = 16+16 at NTP 8. A nitrogen cylinder has a volume of 1 cu ft and a pressure of 100 psig @ 25 degrees C. What is the pressure if the temperature is raised to 84 degrees C? 9. How much does a 55 gallon drum of toluene weigh SG = .866? (5 points) 10. Calculate the vapor volume (mº) for 6 moles of CS2 (SG = 1.26). (5 points)

Answer 1

1. (200 mL/1 m³)

=(200 mL/1000 dm³) as 1m= 10 dm

= (200 mL/1000 L) as 1dm³= 1L

=(200 mL/10⁶ mL) as 1 L= 1000 mL

= 200 ppm. As 1 ppm = 1/ 10⁶

2. 1 ft³= 28317 mL

So 75 L/2000 ft³

= (75000 mL/ 2000× 28317 mL)

=(75/56634)

=1.324× 10^-3

=1324×10^-6

=1324 ppm

3. Standard pressure = 760 mm Hg

Given concentration of SO2= 41000 ppm

So partial pressure= (760 ×41000)×10^-6 mm Hg

=31.16 mm Hg