Review I Constants I Periodic TableThe U.S. Environmental Protection Agency (U.S. EPA) monitors air quality inthe United States. Lead is among the pollutants regularly monitored andregulated. Lead is released into the atmosphere primarily by the processing ofmetals ores containing lead and by lead-based battery manufacturing. Theeffects of too much exposure to lead include neurological damage andcardiovascular disease. Because of the Clean Air Act and its amendments, theamounts of lead in air have been decreasing for many years. The chart belowshows the lead concentration in air in the United States from 2000 to 2014.Part DHow 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)3.2x108 Pb atomsPrevious AnswersSubmitAnswer RequestedAlthough the sample size is small, 1 cm3 = 1 x 10-° m3, and a concentration of 0.11 ug/m3 results in a mass of(1 x 10- m3) x 0.11ug/m31.1 x 10ug, since there are 6.022 x 1023 atoms/mol, the total number of atoms is quite large inFigure1 of 1comparison.Lead Concentration in Air in U.S.Part E0.35If there is 24.1% Pb-206 in any sample of lead, how many Pb-206 atoms were in one cubic centimeter of air in 2011?0.3Express the number of lead-206 atoms numerically.0.250.2| ν ΑΣφ?0.150.10.050-1998 2000 2002 2004 2006 2008 2010 2012 2014 2016SubmitRequest AnswerYearSource: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html)Pb Concentration ug/m

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Asked Aug 30, 2019
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Please answer Part E

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.
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)
3.2x108 Pb atoms
Previous Answers
Submit
Answer Requested
Although the sample size is small, 1 cm3 = 1 x 10-° m3, and a concentration of 0.11 ug/m3 results in a mass of
(1 x 10- m3) x 0.11ug/m3
1.1 x 10ug, since there are 6.022 x 1023 atoms/mol, the total number of atoms is quite large in
Figure
1 of 1
comparison.
Lead Concentration in Air in U.S.
Part E
0.35
If there is 24.1% Pb-206 in any sample of lead, how many Pb-206 atoms were in one cubic centimeter of air in 2011?
0.3
Express the number of lead-206 atoms numerically.
0.25
0.2
| ν ΑΣφ
?
0.15
0.1
0.05
0-
1998 2000 2002 2004 2006 2008 2010 2012 2014 2016
Submit
Request Answer
Year
Source: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html)
Pb Concentration ug/m
help_outline

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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. 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) 3.2x108 Pb atoms Previous Answers Submit Answer Requested Although the sample size is small, 1 cm3 = 1 x 10-° m3, and a concentration of 0.11 ug/m3 results in a mass of (1 x 10- m3) x 0.11ug/m3 1.1 x 10ug, since there are 6.022 x 1023 atoms/mol, the total number of atoms is quite large in Figure 1 of 1 comparison. Lead Concentration in Air in U.S. Part E 0.35 If there is 24.1% Pb-206 in any sample of lead, how many Pb-206 atoms were in one cubic centimeter of air in 2011? 0.3 Express the number of lead-206 atoms numerically. 0.25 0.2 | ν ΑΣφ ? 0.15 0.1 0.05 0- 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 Submit Request Answer Year Source: U.S. EPA Air Trends (http://3.epa.gov/airtrends/lead.html) Pb Concentration ug/m

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Expert Answer

Step 1

From the graph, in 2011, the concentration of lead is 0.1 µg/m3 which means 1m3 contains 0.1 µg of lead. Therefore, 1cm3 will contain 0.1×10-6 µg of lead. (since 1 cm3 = 10-6 m3)


Given, lead sample consists of 24.1 % of Pb-206. The mass of Pb-206 in lead sample can be calculated as:

Mass of Pb-206 = 24.1% of 0.1x10-6 ug
Mass of Pb-206 = 0.0241 x 10-6 ug
(since, 1 g 10-6 g)
Mass of Pb-206 = 0.0241 x 10-12 g
=
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Mass of Pb-206 = 24.1% of 0.1x10-6 ug Mass of Pb-206 = 0.0241 x 10-6 ug (since, 1 g 10-6 g) Mass of Pb-206 = 0.0241 x 10-12 g =

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Step 2

The number of moles of Pb-206 can be calculated as:

Mass
Moles of Pb-206 =Molar mass
0.0241 x 10-12
Moles of Pb-206 =
206 g/mol
Moles of Pb-206 = 1.17 x 10-16 mol
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Mass Moles of Pb-206 =Molar mass 0.0241 x 10-12 Moles of Pb-206 = 206 g/mol Moles of Pb-206 = 1.17 x 10-16 mol

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Step 3

Since one mole of a component contains 6.022×1023 atoms. Therefore, the number of ...

Number of atoms
Moles x Avogadro's number
Number of atoms = 1.17 x 10-16 mol x 6.022 x 1023 mol1
107
Number of atoms = 70457400 = 7.05 x
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Number of atoms Moles x Avogadro's number Number of atoms = 1.17 x 10-16 mol x 6.022 x 1023 mol1 107 Number of atoms = 70457400 = 7.05 x

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