Ask a New Question

an original sample of K-40

Iron-53 has a half-life of 8.51 minutes. After 15.0 minutes, 132 mg remain from the original sample.a) What was the original
1. 1 answer
2. 79 views
Iron-53 has a half-life of 8.51 minutes . After 15.0 minutes, 132 mg remain from the original sample.a) What was the original
1. 1 answer
2. 72 views
Iron-53 has a half-life of 8.51 minutes. After 15.0 minutes, 132 mg remain from the original sample.a) What was the original
1. 1 answer
2. 69 views
A sample consists of the following n � 6 scores: 2, 7,4, 6, 4, and 7. a. Compute the mean and standard deviation for the sample.
1. 1 answer
2. asked by Nickie
3. 1,686 views
an original sample of K-40 has a mass of 25.00 grams. After 3.9x 10 to the ninth years, 3.125 grams of the original sample
1. 1 answer
2. asked by micky
3. 826 views
A substance undergoes a first-order decomposition. After 40.0 min at 500 degrees C, only 12.5% of the original sample remains.
1. 4 answers
2. asked by Bob
3. 1,086 views
Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy unit must be replaced when
1. 1 answer
2. asked by hannah
3. 3,350 views
A sample of a radioactive substance decayed to 94.5% of its original amount after a year. (Round your answers to two decimal
1. 2 answers
2. asked by kela
3. 20,931 views
A sample of a radioactive substance decayed to 93.5% of its original amount after a year.a) What is the half-life of the
1. 2 answers
2. asked by Lee
3. 5,076 views
If a sample of a radioactive isotope has a half-life of 5 year(s), how much of the original sample will be left at the end of
1. 1 answer
2. asked by TITA
3. 441 views