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Chemistry, 02.10.2019 15:00 nena4200

Lanthanum-138 has a half-life of 105 billion years. after 525 billion years, how much of a 240 g sample of this radioisotope will remain?

nevermind, i got 7.5g and was right

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Lanthanum-138 has a half-life of 105 billion years. after 525 billion years, how much of a 240 g sam...

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