You find a radioactive substance in the chemistry storage locker. You measure the mass of the substance and find that it is 5 grams. You do some research and find that this substance has a half-life of 10 seconds. How much mass of this substance was in the chemistry storage locker 1 hour before you found it? 0 10 grams O 40 grams O 120 grams O 320 grams O 640 grams O It is impossible to know the starting mass of any substance due to radioactive day.​
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You find a radioactive substance in the chemistry storage locker. You measure the mass of the substa...
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