Mathematics, 16.11.2020 09:40 wilkvictor07

The half-life of the radioactive element unobtanium -41 is 20 seconds. If 48 grams of unobtanium-41 are initially present, how many grams are present after 20 seconds? 40 seconds? 60 seconds? 80 seconds? 100 seconds?

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The half-life of the radioactive element unobtanium -41 is 20 seconds. If 48 grams of unobtanium-41...

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