Question

When fuels are burned in air, such as in an automobile engine, some of the nitrogen in the air oxidizes to form nitrogen oxide gases such as NO and NO2 (known collectively as NOx). The U.S. Environmental Protection Agencey (EPA) sets standards for air quality of several pollutants including NO2. According to the EPA, NO2 levels in U.S. cities are not to exceed a yearly average of 53 ppb or a 1-hour average of 100 ppb. Another pollutant associated with automobile exhaust is ozone (O3). The EPA standard for ozone is an 8-hour average of 70 ppb. Breathing air with elevated levels of NO2 or O3 can cause asthma and other respiratory problems. The graph on the next page shows the average concentration of nitrogen dioxide (NO2) and ozone (O3) gases in units of parts per billion by volume (ppbv) over seven days in a large city.

Name: Problem 153, Chapter 10: Chemistry: Structure and Properties
Uploaded: 2022-01-14T15:17:46-08:00
Duration: 1 min
Channel: Manik Pulyani

   When fuels are burned in air, such as in an automobile engine, some of the nitrogen in the air oxidizes to form nitrogen oxide gases such as NO and NO2 (known collectively as NOx). The U.S. Environmental Protection Agencey (EPA) sets standards for air quality of several pollutants including NO2. According to the EPA, NO2 levels in U.S. cities are not to exceed a yearly average of 53 ppb or a 1-hour average of 100 ppb. Another pollutant associated with automobile exhaust is ozone (O3). The EPA standard for ozone is an 8-hour average of 70 ppb. Breathing air with elevated levels of NO2 or O3 can cause asthma and other respiratory problems. The graph on the next page shows the average concentration of nitrogen
dioxide (NO2) and ozone (O3) gases in units of parts per billion by volume (ppbv) over seven days in a large city.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Chapter 10, Problem 153

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Solved by Expert Manik Pulyani

01/14/2022

Step 1

S. Environmental Protection Agency (EPA) for air pollutants. For nitrogen dioxide (NO2), the yearly average concentration should not exceed 53 parts per billion (ppb), and the 1-hour average concentration should not exceed 100 ppb. For ozone (O3), the standard is Show more…

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When fuels are burned in air, such as in an automobile engine, some of the nitrogen in the air oxidizes to form nitrogen oxide gases such as NO and NO2 (known collectively as NOx). The U.S. Environmental Protection Agencey (EPA) sets standards for air quality of several pollutants including NO2. According to the EPA, NO2 levels in U.S. cities are not to exceed a yearly average of 53 ppb or a 1-hour average of 100 ppb. Another pollutant associated with automobile exhaust is ozone (O3). The EPA standard for ozone is an 8-hour average of 70 ppb. Breathing air with elevated levels of NO2 or O3 can cause asthma and other respiratory problems. The graph on the next page shows the average concentration of nitrogen dioxide (NO2) and ozone (O3) gases in units of parts per billion by volume (ppbv) over seven days in a large city.