Luna Coles
05/25/2023 · Junior High School
The half-life of the radioactive element unobtanium-59 is 10 seconds. If 176 grams of unobtanium- 59 are initially present, how many grams are present after 10 seconds? 20 seconds? 30 seconds? 40 seconds? 50 seconds? The amount left after 10 seconds is 88 grams. The amount left after 20 seconds is grams.
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- After 10 seconds: 88 grams
- After 20 seconds: 44 grams
- After 30 seconds: 22 grams
- After 40 seconds: 11 grams
- After 50 seconds: 5.5 grams
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