amiechap12 amiechap12

25-01-2019
English

contestada

Potassium-40 (K-40) decays into argon-40 (Ar-40). After 1.25 billion years, 20 grams of K-40 would be reduced to 10 grams. How much of the original K-40 would remain after 5 billion years?

A. 0 grams
B. 1.25 grams
C. 2.5 grams
D. 5 grams

Respuesta :

chanel69 chanel69

16-05-2019

B. 1.25 grams :))))))))))))

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lalapoopypants lalapoopypants

20-11-2019

the answer is B. 1.25 grams

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