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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

Table 32.1 indicates that 7.50 mCi of 99mTc is used in a brain scan. What is the mass of technetium?

To determine

The mass of the technetium.

Explanation

Given info:

The activity is

  A=7.50m·Ci

Formula used:

The mass can be found as

  m=NNa×molarmass

Calculation:

The activity

  A=7.50m·Ci=7.50×3.70×107BqA=2.78×108Bq

Activity is defined as

  A=Nln2T 1 2N=AT1/2ln2

Substituting the values

  N=(2

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