Use the graph below to answer the following questions. 100% 75% Amount of carbon- 14 50%+ 25%+ 12.5%+ Radioactive Decay of Carbon-14 0 5730 Time (years) a. How long is a half-life for carbon-14 (in years)? A b. If only 25% of the carbon-14 remains, how old (in years) is the material containing the carbon-14? N 10,740 16,110 c. If a sample originally had 120 atoms of carbon-14, how many atoms will remain after 16,110 years? A/
Use the graph below to answer the following questions. 100% 75% Amount of carbon- 14 50%+ 25%+ 12.5%+ Radioactive Decay of Carbon-14 0 5730 Time (years) a. How long is a half-life for carbon-14 (in years)? A b. If only 25% of the carbon-14 remains, how old (in years) is the material containing the carbon-14? N 10,740 16,110 c. If a sample originally had 120 atoms of carbon-14, how many atoms will remain after 16,110 years? A/
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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75%
Use the graph below to answer the following questions.
Amount
of
carbon-
14
50%+
25%+
12.5%+
E Revitalize Beaut...
0
Radioactive Decay of Carbon-14
5730
Time (years)
a. How long is a half-life for carbon-14 (in years)?
Food irradiation... x ggc.view.usg.edu
10,740 16.110
N
$
A/
c. If a sample originally had 120 atoms of carbon-14, how many atoms will remain
after 16,110 years?
A/
b. If only 25% of the carbon-14 remains, how old (in years) is the material containing
the carbon-14?
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Expert Solution
Step 1
Solution - The given graph shows radioactive decay of C-14 .
1) Half life of carbon -14 is 5730 years because in 5730 years , carbon -14 remains 50% from its actual value .
2) It is clearly visible from graph that 25% of carbon remains after 10740 years , so carbon 14 is 10740 years old when it remains 25% from its actual value .
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