funguy904 funguy904

26-02-2024
Chemistry

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Uranium-232 has a half-life of 68.9 years. A sample from 206.7 years ago contains 1.40 g of uranium-232. How much uranium was originally present?

a) 1.20 g
b) 2.80 g
c) 4.20 g
d) 8.40 g

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