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Maslowich
3 years ago
10

A certain element has a half-life of three years.

Chemistry
1 answer:
lakkis [162]3 years ago
3 0

(C) 320 g

Explanation:

A = A02^(-t/hl)

where hl = half-life

A0 = original amount

A = present amount

t = elapsed time = 5 half-lives

10g = A02^(-5) = A0/32

A0 = 32×(10 g) = 320 g

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