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40 votes
40 votes
The half-life of chromium-51 is 28 days. If the sample contained 5.10 grams, how much chromium was present 168 days ago?

User Vivek Kumar Ray
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1 Answer

18 votes
18 votes
I don’t understand how many grams had the first one,so I can’t help you
User Saad Attieh
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