Question

The radioactive isotope which is often used for diagnosis and imaging in nuclear medicine has a...

The radioactive isotope which is often used for diagnosis and imaging in nuclear medicine has a half-life of 3 days. What was the initial mass of the isotope before decay, if the mass in 6 weeks was 5g?

Homework Answers

Answer #1

In this question we have to find initial mass of the decaying substance.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Radioisotopes are often used in diagnostic imaging for detecting disease. The isotope F-18, which has a...
Radioisotopes are often used in diagnostic imaging for detecting disease. The isotope F-18, which has a half-life of 110 min, is used in medical imaging. What percentage of the original acitivity in the sample remains after 300 min? Remember that half life is given by k=0.693/t1/2 ? Show your work.
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. If a sample has...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. If a sample has an initial mass of 64 mg, a function that models the mass in mg after t hours is a(t) =   The initial mass will decay to 12 mg after ______ hours Radioactive decay equation: a(t) = a0⋅2 ^ (−t / h) a0 = starting amount a(t) = amount after t hours h = half life in hours
The radioactive isotope (82 Sr) has a half-life of 25.4 days. A sample containing this isotope...
The radioactive isotope (82 Sr) has a half-life of 25.4 days. A sample containing this isotope has an initial activity at (t = 0) of 4.5 x 10^8 Bq. Calculate the number of nuclei that will decay in the time interval between t1 = 34.0 hours and t2 = 50.0 hours.
Radioactive iodine is used in nuclear imaging techniques such as photoemission tomography (PET scans) and X-ray...
Radioactive iodine is used in nuclear imaging techniques such as photoemission tomography (PET scans) and X-ray CT scans. It decays according to the nuclear reaction below I^123 à Te^123 + electron neutrino The following experiments were run to determine the order of the reaction: Rate (mol/L hr)    [I^123] 0.00725                     0.137 0.137                       0.275 0.00362                  0.0685 (a)write the generic rate law for this nuclear decay (rate=k[I^123]^n) (b) what Is the value of k with its correct units? (c) what is...
Consider a pure sample of a radioactive isotope with a mass number of (52). If the...
Consider a pure sample of a radioactive isotope with a mass number of (52). If the sample has mass of (25.0) micrograms and the isotope has a half-life of (12.5)x10^6 years, determine the decay rate for the sample. Give your answer in decays/second and with 3 significant figures.
The radioactive isotope (95 Nb) has a half-life of 35 days. A sample containing this isotope...
The radioactive isotope (95 Nb) has a half-life of 35 days. A sample containing this isotope has an initial activity at (t = 0) of 4.50 x 10 ^8 Bq. Calculate the number of nuclei that will decay in the time interval between t1 = 30.0 hours and t2= 55.0 hours. Ans in nuclei and need it asap
The radioactive isotope 234Pa has a half-life of 6.70 h. A sample containing this isotope has...
The radioactive isotope 234Pa has a half-life of 6.70 h. A sample containing this isotope has an initial activity (t = 0) of 35.0µCi. Calculate the number of nuclei that decay in the time interval between t1 = 7.0 h and t2 = 14.0 h. ___________ Nuclei
When radioactive tracers are used for medical scans, the tracers both decay in the body via...
When radioactive tracers are used for medical scans, the tracers both decay in the body via radiation, as well as being excreted from the body. The effective half-life of the radioactive tracer is due to the combination of both effects. Medical experiments show that a stable (nonradioactive) isotope of a particular element have an excretion half-life of 6 days. A radioactive isotope of the same element has a half-life of 9 days. What is the effective half-life of the radioactive...
The radioactive isotope Gold-198 has a half-life of 64.80 hrs. A sample containing this isotope has...
The radioactive isotope Gold-198 has a half-life of 64.80 hrs. A sample containing this isotope has an initial activity of 40.0 μCi. Calculate the number of nuclei that will decay in the time interval from 10 hrs to 12 hrs.[10 marks]
The radioactive isotope 133 54Xe  is used in pulmonary respiratory studies to image the blood flow and...
The radioactive isotope 133 54Xe  is used in pulmonary respiratory studies to image the blood flow and the air reaching the lungs. The half-life of this isotope is 5 days. A hospital needs 0.100 g of 133 54Xe for a lung-imaging test. If it takes 10days to receive the shipment, what is the minimal amount mXe of xenon that the hospital should order? Express your answer numerically in grams
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT