e048098 e048098
  • 11-01-2024
  • Chemistry
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sodium-25 is to be used in an experiment in our lab. If 5.0mg of sodium-25 was removed from the reactor at 4:58 pm, exactly how many mg of the isotope was placed in our reaction vessel in the laboratory at 5:01pm? The half -life of sodium-25 is 60 seconds

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