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- (a) What is the difference between chlorofluorocarbonsand hydrofluorocarbons? (b) Why are hydrofluorocarbonspotentially less harmful to the ozone layer than CFCs?Why are CHF2Cl and CH2ClCF3 important for stratospheric ozone depletion? pls consider its lifetime.Suppose you have an 8-hour ozone value of 0.088 ppm, and a PM2.5 value of 35.7 ug/m3. The AQI value is Blank 1 and the responsible pollutant is Blank 2. According to the AQI scale, this falls under the category Blank 3. Note: for the pollutant, choose between ozone and PM2.5 These Breakpoints. .equal this AQI ...and this ... category Air Quality Index Levels of Health Concern Numerical Value PM30 PM25 (48/m³)| (48/m²') SO2 (ppb) 1-hour NO2 (ppb) 1-hour CO AQI (ppm) (ppm) 1-hour (ppm) 8-hour 8-hour 24-hour 24-hour Good 0 to 50 0.000 - 0.0 – 12.0 0- 54 0.0 - 4.4 0- 35 0- 53 0- 50 Good 0.054 Moderate 51 to 100 55 - 154 4.5 - 9.4 54 - 100 51 - 100 0.055 - 0.070 12.1 - 36 - 75 Moderate 35.4 Unhealthy for Sensitive Groups 101 to 150 155 - 254 9.5 - 12.4 76 - 185|101 - 360 101 - 150 Unhealthy for Sensitive Groups 0.071 - 0.125- 35.5 - 0.085 0.164 55.4 255 - 354 Unhealthy 151 to 200 (186 - 304)* 0.086 - 0.165 - (55.5 - 12.5 - 361 - 649 151 - 200 Unhealthy 0.105 0.204 150.4) 15.4 Very Unhealthy…
- Suppose you have an 8-hour ozone value of 0.088 ppm, and a PM2.5 value of 35.7 ug/m3. The AQI value is Blank 1 and the responsible pollutant is Blank 2. According to the AQI scale, this falls under the category Blank 3. Note: for the pollutant, choose between ozone and PM2.5 These Breakpoints.. .equal this AQI .and this category Air Quality Index Levels of Health Concern Numerical Value O3 PM25 PM10 CO SO2 NO2 AQI (ppm) 1-hour (H8/m) (H8/m²) (ppm) 8-hour (ppm) (ppb) (ppb) 8-hour 24-hour 24-hour 1-hour 1-hour Good 0 to 50 0.0 - 4.4 0- 53 0- 50 0.000 - 0.054 0.0- 12.0 0- 54 0- 35 Good Moderate 51 to 100 55 - 154 54 - 100 0.055 - 0.070 12.1 - 4.5 - 9.4 36 - 75 51 - 100 Moderate 35.4 Unhealthy for Sensitive Groups 101 to 150 0.125 - 155 - 254 9.5 - 12.4 76 - 185 101 - 360 101 - 150 Unhealthy for Sensitive Groups 0.071 - 35.5 - 0.085 0.164 55.4 0.086 - 0.165 - 255 - 354 361 -649 151 - 200 Unhealthy 151 to 200 (55.5 - 150.4) (186 - 304)* 12.5 - Unhealthy 0.105 0.204 15.4 Very Unhealthy 201…Suppose you have an 8-hour ozone value of 0.088 ppm, and a PM2.5 value of 35.7 pg/m3. The AQI value is Blank 1 and the responsible pollutant is Blank 2. According to the AQI scale, this falls under the category Blank 3. Note: for the pollutant, choose between ozone and PM2.5 These Breakpoints. .equal this AQI ..and this ... category Air Quality Index Levels of Health Numerical Value PM25 PM30 (H8/m') (Hg/m) Co SO2 NO2 AQI Concern (ppm) 1-hour (ppm) (ppm) (ppb) (ppb) 1-hour 8-hour 24-hour 24-hour 8-hour 1-hour Good O to 50 0.000 - 0.0-12.0 0- 54 0.0 - 4.4 0- 35 0 - 53 0- 50 Good 0.054 Moderate 51 to 100 0.055 - 12.1- 55 - 154 4.5 -9.4 36 - 75 54 - 100 51 - 100 Moderate 0.070 35.4 Unhealthy for Sensitive Groups 101 to 150 0.125 - 155 - 254 9.5 - 12.4 76 - 185101 - 360 101 - 150 Unhealthy for Sensitive Groups 0.071 - 35.5 - 0.085 0.164 55.4 0.086 - 0.165 - (55.5 - 255 - 354 12.5 - (186 - Unhealthy 151 to 200 361 - 649 151 - 200 Unhealthy 0.105 0.204 150.4) 304)* 15.4 Very Unhealthy 201 to…2.) It’s a bad day in the lab! Two students are doing experiments. Each is 20 feet away from the professor. At the same time, each of them lets the same amount of a smelly gas into the room. One of them releases ammonia, NH3, and the other releases SO2. NH3 has a pungent odor, and SO2 smells like rotten eggs. The professor has no idea that this has happened, until she smell the first gas. Which chemical will the professor smell first? (NH3 or SO2) . If the professor starts to smell the first gas 42. seconds after the gas is released, how long will it take her to smell the second gas? sec. * Note: It is unsafe practice to work with these chemicals in an open lab.
- The combustion of gasoline (octane) in a car engine can be represented by the following equation: 2C3H18(1) + 2502(g) --> 16CO2(g) +18H2O(g) a. What mass of oxygen is used up to burn a full tank of 36.00 kg of gasoline? b. Why might a vehicle that is calibrated to run perfectly at sea level run poorly at higher elevations? C. According to the Canadian Automobile Association, the average Canadian drives 20,000 km/yr. Assuming that distance, how many more kg of carbon dioxide are added to the atmosphere each year by a Toyota Tacoma (fuel economy of 12.8 L/100 km) than a Toyota Prius (4.52 L/100 km)? The density of gasoline is 0.719 kg/L.Average ozone concentrations in Jakarta, Indonesia have been reported to be 0.015mg m3 and in Tokyo, Japan are 20ppbv. What is the approximate ratio of these two values when expressed in the same units?A commercial 737 jet transporting 143 passengers and 5 crew members from Kansas city (MCI) to Baltimore (BWI) burned 11800 lb. of Jet A fuel. Jet A fuel is kerosene based, consisting primarily of CnH2n+2 hydrocarbons, with n = 6 to 16, so the Carbon:Hydrogen ratio is close to 1:2. During this flight , how much CO2 (in kg) was released into the atmosphere? (assume the combustion of fuel was complete, so all fuel was converted into H2O and CO2).
- 13. The burner gas's composition, as determined by Orsat, is devoid of SO3. true or falseIt is believed that the reaction responsible or he depletion 0201e in the atohosphere 's Oalg)'t NoG)OgG) tMO, G) 17 46-41 q Q rearts with excess MO, how man will be produced?Dinitrogen monoxide (N₂O; nitrous oxide) is a greenhousegas that enters the atmosphere principally from natural fertilize rbreakdown. Some studies have shown that the isotope ratios of ¹⁵N to ¹⁴N and of ¹⁸O to ¹⁶O in N₂O depend on the source, which can thus be determined by measuring the relative abundance ofmolecular masses in a sample of N₂O.(a) What different molecular masses are possible for N₂O?(b) The percent abundance of ¹⁴N is 99.6%, and that of ¹⁶O is 99.8%. Which molecular mass of N₂O is least common, andwhich is most common?
