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Charlesnep Charlesnep
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3 years ago
What was the original mass of a cobalt-60 sample that decayed for 100 years to a mass of 0.0259 g? The half-life of cobalt-60 is 5.27 years.


▸ 1.33×104 g

▸ *
Textbook 
Chemistry: An Atoms First Approach

Chemistry: An Atoms First Approach


Edition: 3rd
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thransanthransan
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3 years ago
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Charlesnep Author
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3 years ago
Smart ... Thanks!
Chaldoren
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Yesterday
this is exactly what I needed
ethom947
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2 hours ago
Good timing, thanks!
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