(a)
Interpretation:
The balanced chemical equation for the decay of Sr-90 needs to be determined.
Concept introduction:
A
(b)
Interpretation:
The value of
Concept introduction:
The mass defect for any nuclear reaction is the change in masses of the species involved in the process.
For a general nuclear reaction as follows:
The mass defect can be calculated as follows:
Here, m is
(c)
Interpretation:
The amount of energy released by the decay of 6.50 mg of Sr-90 needs to be determined.
Concept introduction:
From the mass defect, the change in energy can be calculated as follows:
Here,

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Chapter 18 Solutions
PRINCIPLES+REACTIONS
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