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- Why is ground level ozone most likely to reach its highest concentrations on hot, sunny days during periods of heavy traffic in large cities?
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- As of the writing of this text, EPA standards limit atmospheric ozone levels in urban environments to 84 ppb. How many moles of ozone would there be in the air above Los Angeles County (an area about 4000 square miles; consider a height of 100 m above the ground) if ozone was at this concentration?When ozone levels in urban area reach unhealthy levels, residents are typically urged to avoid refuelingtheir cars during daylight hours. Explain how this might help to reduce smog formation?The ultraviolet spectrum can be divided into three regions based on wavelength: UV-A (315–400 nm), UV-B (280–315 nm), and UV-C (100–280 nm) In the absence of ozone, which of these three regions, if any, are absorbed by the atmosphere?
- How do chemists know that none of the individual Lewis structures of ozone are not accurate depictions of an ozone molecule, and how is this discrepancy addressed?Explain the role of ozone gas in troposphere and stratosphere. What do you understand by ozone layer depletion? Explain the causes and solution of ozone layer depletion.Write the two reactions that contribute most significantly to ozone destruction in the stratosphere (non-catalyzed reactions).
- Discuss the activity of ozone as a greenhouse gas. Write down the chemical reactions of ozone depletion.Explain the different mechanisms by which ozone is formed in the troposphere as a pollutant and in the stratosphere as a protective shield.Ozone depletion at mid-latitudes may be caused by the denitrification of cold sulphuric acid droplets. Is this correct？please explain the reason.
- Which of the following best explains why holes in the ozone layer appear predominantly over the South Pole?A. Formation of ice crystals in stratospheric clouds during the long winters provide surfaces that convert otherwise safe molecules into those that deplete ozone.B. Because of their polarization, free radical chlorine atoms are attracted to the southern magnetic pole where they more effectively serve as catalysts.C. Chlorofluorocarbons combine with higher concentrations of chlorinated carbon compounds from natural sources that are more prevalent in Antarctica.D. Ozone depletion occurs equally all over the globe, but the ozone layer is naturally thinner over Antarctica.Reset SelectionMark for Review What’s This?True or False: Ground level ozone and airborne particles are the two air pollutants that pose the low risk to human health.4. Photochemical smog is a type of air pollution in the troposphere of our planet produced when sunlight acts upon motor vehicle exhaust gases to form harmful substances such as ozone (O3). For example, nitrogen dioxide (NO2) reacts with atmospheric oxygen (O2) in the presence of light to produce ozone (O3) and nitrogen monoxide (NO).