Question
In: Chemistry
You are using a Geiger counter to measure the activity of a radioactive substance over the...
You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400. counts has diminished to 100. counts after 63.7 minutes , what is the half-life of this substance?
Solutions
queen_honey_blossom answered 2 years agoRelated Solutions
Part A:You are using a Geiger counter to measure the activity of a radioactive substance over...
Part A:You are using a Geiger counter to measure the activity of
a radioactive substance over the course of several minutes. If the
reading of 400. counts has diminished to 100. counts after 61.7
minutes , what is the half-life of this substance?
Part B; An unknown radioactive substance has a half-life of 3.20
hours . If 27.1 g of the substance is currently present, what mass
A0 was present 8.00 hours ago?
Part C:Americium-241 is used in some smoke...
Part A: You are using a Geiger counter to measure the activity of a radioactive substance...
Part A:
You are using a Geiger counter to measure the activity of a
radioactive substance over the course of several minutes. If the
reading of 400. counts has diminished to 100. counts after 28.1
minutes, what is the half-life of this substance?
Part B:
An unknown radioactive substance has a half-life of 3.20 hours.
If 15.7 g of the substance is currently present, what mass
A0 was present 8.00 hours ago?
Part C:
Americium-241 is used in some smoke...
Part A You are using a Geiger counter to measure the activity of a radioactive substance...
Part A
You are using a Geiger counter to
measure the activity of a radioactive substance over the course of
several minutes. If the reading of 400. counts has diminished to
100. counts after 26.3 minutes , what is the half-life of this
substance?
Part B
An unknown radioactive substance has a half-life of 3.20 hours .
If 10.6 g of the substance is currently present, what mass
A0 was present 8.00 hours ago?
11) Part A You are using a Geiger counter to measure the activity of a radioactive...
11)
Part A
You are using a Geiger counter to measure the activity of a
radioactive substance over the course of several minutes. If the
reading of 400. counts has diminished to 100. counts after 70.8
minutes , what is the half-life of this substance?
Express your answer with the appropriate units.
t1/2 =
Part B
An unknown radioactive substance has a half-life of 3.20 hours .
If 24.2 gof the substance is currently present, what mass
A0 was present...
A Geiger counter counts the number of alpha particles from radioactive material. Over a long period...
A Geiger counter counts the number of alpha particles from
radioactive material. Over a long period of time, an average of 25
particles per minute occurs. Assume the arrival of particles at the
counter follows a Poisson distribution.
Find the probability that at least one particle arrives in a
particular one second period. Round your answer to four
decimals.
Find the probability that at least two particles arrive in a
particular 2 second period. Round your answer to four...
In a Geiger counter, a thin metallic wire at the center of a metallic tube is...
In a Geiger counter, a thin metallic wire at the center of a
metallic tube is kept at a high voltage with respect to the metal
tube. Ionizing radiation entering the tube knocks electrons off gas
molecules or sides of the tube that then accelerate towards the
center wire, knocking off even more electrons. This process
eventually leads to an avalanche that is detectable as a current. A
particular Geiger counter has a tube of radius R and the inner...
1) A radioactive substance decays at a rate proportional to the amount of the substance at...
1) A radioactive substance decays at a rate proportional to the
amount of the substance at present time. Initially 200 grams of a
the substance was present and remain 80% of the initial amount
after 2 hours.
A.) Determine the amount of the substance remaining after 10
hours (counted in grams)
B.) Determine the time that 60% of the initial amount of the
substance has decayed (counted in hours)
The activity of a sample of radioactive material was measured over 12 h. The following net...
The activity of a sample of radioactive material was measured
over 12 h. The following net count rates were obtained at the times
indicated:
Time (h)
Counting Rate (counts/min)
1
3100
2
2450
4
1480
6
910
8
545
10
330
12
200
1a) Plot the activity curve on semilog paper.
1b) Determine the disintegration constant and the half-life of
the radioactive nuclei in the sample.
The activity of a sample of radioactive material was measured over 12 h. The following net...
The activity of a sample of radioactive material was measured
over 12 h. The following net count rates were obtained at the times
indicated:
Time (h)
Counting Rate
(counts/min)
1
3100
2
2450
4
1480
6
910
8
545
10
330
12
200
1a + b) Wanted you to find the disintegration constant and the
half-life. I've found those correctly. The disintegration constant
is .24974 h^-1, and the half-life is 2.77 hours. (you had to take
ln() and find the...
A 35.0g idol made of wood has a Geiger counter placed next to it and found...
A 35.0g idol made of wood has a Geiger counter placed next to it
and found that it emitted 130 decays during a 5.00 minute time
frame. How old is the artifact?
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