Solution Found!
IP Mantles in Gas Lanterns Gas lanterns used on camping
Chapter 32, Problem 74GP(choose chapter or problem)
Mantles in Gas Lanterns Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. Thorium is used, even though it is radioactive, because it forms an oxide that can withstand being
incandescent for long periods of time. Almost all natural thorium is \({ }_{90}^{232} T h\) which has a half-life of \(1.405 \times 10^{10} y\).
(a) A typical mantle contains 325 mg of thorium. What is the activity of the mantle?
(b) If the half-life of thorium had been double its actual value, by what factor would the activity of a mantle be changed? Explain.
Equation Transcription:
Text Transcription:
_{90}^{232} T h
1.405 \times 10^{10} y
Questions & Answers
QUESTION:
Mantles in Gas Lanterns Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. Thorium is used, even though it is radioactive, because it forms an oxide that can withstand being
incandescent for long periods of time. Almost all natural thorium is \({ }_{90}^{232} T h\) which has a half-life of \(1.405 \times 10^{10} y\).
(a) A typical mantle contains 325 mg of thorium. What is the activity of the mantle?
(b) If the half-life of thorium had been double its actual value, by what factor would the activity of a mantle be changed? Explain.
Equation Transcription:
Text Transcription:
_{90}^{232} T h
1.405 \times 10^{10} y
ANSWER:
Step 1 of 3
The mantle of a gas lantern contains a small amount of radioactive 
The activity 
