Review I Constants I Periodic Table The U.S. Environmental Protection Agency (U.S. EPA) monitors air quality in the United States. Lead is among the pollutants regularly monitored and regulated. Lead is released into the atmosphere primarily by the processing of metals ores containing lead and by lead-based battery manufacturing. The effects of too much exposure to lead include neurological damage and cardiovascular disease. Because of the Clean Air Act and its amendments, the amounts of lead in air have been decreasing for many years. The chart below shows the lead concentration in air in the United States from 2000 to 2014 (Figure 1) Previous Answers Submit Correct A decrease in -83% is a substantial improvement in air quality from 2000 to 2014 Part D How many lead atoms were in one cubic centimeter of air in 2006? Express the number of lead atoms numerically. View Available Hint(s) Figure 1 of 1 Lead Concentration in Air in U.S Vη ΑΣφ ? 3.5 108 0.35 Pb atoms 0.3 0.25 Previous Answers Submit 0.2 0.15 XIncorrect; Try Again; 3 attempts remaining 0.1 0.05 0- 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 Part E Complete previous part(s) Year Source: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html) Provide Feedback Next Pb Concentration ug/m
Review I Constants I Periodic Table The U.S. Environmental Protection Agency (U.S. EPA) monitors air quality in the United States. Lead is among the pollutants regularly monitored and regulated. Lead is released into the atmosphere primarily by the processing of metals ores containing lead and by lead-based battery manufacturing. The effects of too much exposure to lead include neurological damage and cardiovascular disease. Because of the Clean Air Act and its amendments, the amounts of lead in air have been decreasing for many years. The chart below shows the lead concentration in air in the United States from 2000 to 2014 (Figure 1) Previous Answers Submit Correct A decrease in -83% is a substantial improvement in air quality from 2000 to 2014 Part D How many lead atoms were in one cubic centimeter of air in 2006? Express the number of lead atoms numerically. View Available Hint(s) Figure 1 of 1 Lead Concentration in Air in U.S Vη ΑΣφ ? 3.5 108 0.35 Pb atoms 0.3 0.25 Previous Answers Submit 0.2 0.15 XIncorrect; Try Again; 3 attempts remaining 0.1 0.05 0- 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 Part E Complete previous part(s) Year Source: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html) Provide Feedback Next Pb Concentration ug/m
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.19QAP
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Question
Transcribed Image Text:Review I Constants I Periodic Table
The U.S. Environmental Protection Agency (U.S. EPA) monitors air quality in
the United States. Lead is among the pollutants regularly monitored and
regulated. Lead is released into the atmosphere primarily by the processing of
metals ores containing lead and by lead-based battery manufacturing. The
effects of too much exposure to lead include neurological damage and
cardiovascular disease. Because of the Clean Air Act and its amendments, the
amounts of lead in air have been decreasing for many years. The chart below
shows the lead concentration in air in the United States from 2000 to 2014
(Figure 1)
Previous Answers
Submit
Correct
A decrease in -83% is a substantial improvement in air quality from 2000 to 2014
Part D
How many lead atoms were in one cubic centimeter of air in 2006?
Express the number of lead atoms numerically.
View Available Hint(s)
Figure
1 of 1
Lead Concentration in Air in U.S
Vη ΑΣφ
?
3.5 108
0.35
Pb atoms
0.3
0.25
Previous Answers
Submit
0.2
0.15
XIncorrect; Try Again; 3 attempts remaining
0.1
0.05
0-
1998 2000 2002 2004 2006 2008 2010 2012 2014 2016
Part E Complete previous part(s)
Year
Source: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html)
Provide Feedback
Next
Pb Concentration ug/m
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