Iridium-192, a beta emitter, is used in medicine to treat certain cancers. The 192ir is used as a wire and inserted near the tumor for agiven amount of time and then removed. The 19Ir wire is coated with pure platinum, and is sold by diameter and amount of radiationemitted. One type of wire sold is 139 mm long, has a linear apparent activity of 30-130 MBq/cm, an active diameter (which is theiridium-192) of 0.1 mm, and an outer diameter (the platinum) of 0.3 mm.X Incorrect.(a) How much 192ir is in the wire if the apparent activity is 110 MBq/cm?Enter your answer in scientific notation:1.53x 10i14Ir atomsHintAssistance UsedHalf-life of Ir-192 is 73.827 dX Incorrect.(b) If the wire is placed in the tumor for 30 hours, how much radiation is absorbed by the tumor?i1.65CiHintAssistance UsedThe activity per second is calculated for part (a).

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Answered: Ir atoms

Science

Chemistry

Ir atoms

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Iridium-192, a beta emitter, is used in medicine to treat certain cancers. The 192ir is used as a wire and inserted near the tumor for a
given amount of time and then removed. The 19Ir wire is coated with pure platinum, and is sold by diameter and amount of radiation
emitted. One type of wire sold is 139 mm long, has a linear apparent activity of 30-130 MBq/cm, an active diameter (which is the
iridium-192) of 0.1 mm, and an outer diameter (the platinum) of 0.3 mm.
X Incorrect.
(a) How much 192ir is in the wire if the apparent activity is 110 MBq/cm?
Enter your answer in scientific notation:
1.53
x 10
i
14
Ir atoms
Hint
Assistance Used
Half-life of Ir-192 is 73.827 d
X Incorrect.
(b) If the wire is placed in the tumor for 30 hours, how much radiation is absorbed by the tumor?
i
1.65
Ci
Hint
Assistance Used
The activity per second is calculated for part (a).

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