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Gurjeet Gurjeet
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Posts: 2833
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7 years ago
Nitrogen-13 has a half-life of 10 minutes.  How much of a 128 mg sample would remain after 40 minutes?
A) 4 mg
B) 8 mg
C) 16 mg
D) 32 mg
Textbook 
Chemistry for Changing Times

Chemistry for Changing Times


Edition: 13th
Authors:
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- University of Colorado
- Part-time TA
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Answer verified by a subject expert
BarryOBarryO
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Posts: 1433
7 years ago
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More solutions for this book are available here
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. Smiling Face with Open Mouth

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Gurjeet Author
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7 years ago
Would like to express my heartfelt thanks for your assistance -- you'd make a great teacher
- University of Colorado
- Part-time TA
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