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Chemistry, 24.10.2019 17:43, kamiyaharris1
Fluorine-21 has a half -life of approximately 5 seconds. how much of a 200 gram sample would remain after 1 minute
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Chemistry, 22.06.2019 19:00, elizabethajih99
Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?
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Fluorine-21 has a half -life of approximately 5 seconds. how much of a 200 gram sample would remain...
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