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17 Cards in this Set
- Front
- Back
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In the United States, the national ambient air quality standard for PM10 is 150 μg/m3 for a 24-hour period. What does the term PM10 refer to?
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particulate matter with an average diameter less than or equal to 10 micrometers
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Ozone is considered an air pollutant in the ________ but is a valuable protective
layer in the __________. |
troposphere; stratosphere
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Which pollutant is present in air as particulate matter?
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soot
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The chemical equation N2 + 2O2→ 2NO2 could be represented as shown in the figure. Which statement is true about the formation of the pollutant NO2 in the atmosphere?
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NO2 forms slowly in the atmosphere from the NO emitted by vehicles.
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This graph shows the hydrocarbon and ozone concentrations as a function of the time for a major metropolitan area. At what time would you expect the peak concentration of nitrogen monoxide (NO)?
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8 am
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The graph (in previous question) shows the hydrocarbon and ozone concentrations as a function of the time for a major metropolitan area. Although nitrogen monoxide (NO) is not shown, it would be expected to peak with morning traffic, about the same time as the hydrocarbons. When would you expect the peak concentration of nitrogen dioxide (NO2)?
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An hour or so after the NO peak. NO2 takes time to form in the atmosphere.
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All of these pollutants can be detected by their odors except.
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CO
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On a Periodic Table, the columns of elements with similar properties are
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groups
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In a tropical rain forest, the concentration of water vapor in the atmosphere may reach 50,000 ppm. What is this value expressed as a percent?
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5%
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In the atmosphere, CO2 is still under 0.04%, but increasing each year. What is this value expressed in parts per million?
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400 ppm
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In the air you breathe, which gas has the highest concentration?
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oxygen
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Which reaction takes place in the catalytic converter of an automobile?
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conversion of NO to N2 and O2
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Which of these gases is not part of the exhaust of an automobile engine?
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ozone
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The number 215,000,000,000,000 expressed in scientific notation is:
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2.15 x 10+14
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The number 7.540 x 10-6 expressed in standard decimal (non-scientific) notation is:
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0.00000754
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A young senator excited about Green Chemistry presents new legislation to set controls on vehicles and industry to entirely remove all pollutant molecules from the air. Which is the best critique of this proposal?
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Though this is a worthy goal, it is not attainable regardless of regulations or incentives.
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The United States has more vehicles per capita than any other country, but cleaner air than many other countries because it
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has more governmental regulations on air quality.
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