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bezimeni [28]
3 years ago
11

I WILL GIVE BRAINLYEST!!!!!!!.

Biology
2 answers:
Reptile [31]3 years ago
4 0
I think it is 10 grams
Hope this help you?!
Natalija [7]3 years ago
3 0

Answer:

It's 5 grams

Explanation:

After 2 half lives that would mean a quarter of the original, because one half times one half is one fourth. 20 times one fourth is 5 grams.

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