Help with part C The iodine isotope 13153I is used in hospitals for diagnosis of

Question

Help with part C

The iodine isotope 13153I is used in hospitals for diagnosis of thyroid function. 812g are ingested by a patient. The half-life the iodine isotope 13153I is8.0207 days and mass is 130.906 u.

Determine the activity immediately after ingestion.

Express your answer using three significant figures.

3.74×1012

Correct

Part B

Determine the activity 1.00 h later when the thyroid is being tested.

Express your answer using three significant figures.

3.72×1012

Correct

Part C

Determine the activity 4.0 months later. Suppose that each month has 30 days.

Express your answer using two significant figures.

3.23•107

Incorrect; Try Again; 5 attempts remaining

3.74×1012

Explanation / Answer

decay constant = L = 0.693/T(1/2) = 0.693/(8.0207*24*60*60) = 1.000016623653*10^-6 /s

No = 3.72*10^12

N = No*e^-Lt

N = 3.72*10^12*e^-(1.000016623653*10^-6*4*30*24*60*60)

N = 1.17*10^8 decays/s

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.