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Bapelol Bapelol
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2 weeks ago

In the following diagrams, A represents a radioactive isotope that decays into a new isotope, X. Each circle represents 1 mmol of atoms.

t = 0:
image
t = 25.0 s:
image
Over the first 25.0 s, what is the disintegration rate of A?


▸ 0.120 disintegrations per second

1.81 × 1021 disintegrations per second



▸ 3.00 disintegrations per second

7.23 × 1019 disintegrations per second



1.38 × 10–20 disintegrations per second

Textbook 
Chemistry: Atoms First

Chemistry: Atoms First


Edition: 4th
Author:
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carducbcarducb
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2 weeks ago
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Bapelol Author
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2 weeks ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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Helped a lot
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2 hours ago
Thanks
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