Module 8 EOC Assignment – Part II
Chapter 23  34, 36, 38, 40, 44
Chpt23 #34
•
(1) Provide ALL of the given information.
Include constants, density,
conversion factors, etc.
Gallium – 67 (t
1/2
= 78.25h)
•
(1) State the goal of the problem.
If you ingest a compound of Gallium – 67 containing 0.015mg of this isotope
what mass (in milligrams) remains in your body after 13 days
•
(1) List possible equations that may be used
= .
/
K
0 693t1 ₂
= 
lnAA0
kt
•
(4) Solve the problem and explain the reason for each step of
multiplication, division, addition, or subtraction.
= .
.
K
0 69378 25h
K = 8.856 x 10
3
h
1
.
= 
.
lnA0 015mg
2 76314
.
= .
A0 015mg
6 3093 x 10⁻²
A = 9.46 x 10
⁻⁴
mg =
9.5 x 10
⁻⁴
mg
•
(1) Explain why your answer makes physical and mathematical sense.
Chpt23 #36
•
(1) Provide ALL of the given information.
Include constants, density,
conversion factors, etc.
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Module 8 EOC Assignment – Part II
Chapter 23  34, 36, 38, 40, 44
Radon – 222 emits α particles and has a halflife of 3.82 days
•
(1) State the goal of the problem.
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 Fall '08
 Thomas
 Chemistry, Addition, Elementary arithmetic, EOC Assignment

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