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oee [108]
2 years ago
6

How much of a 0.74mg sample of uranium-235 will remain after 2.8x10^9

Chemistry
1 answer:
ankoles [38]2 years ago
5 0
Of Uranium-235 remains after 2.8 x 10^9 years, what was the original mass of the sample of Uranium-235? The half-life of Uranium-235 is 7.0 x 10^8 years. Uranium-232 has a half life of 68.8 years.
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Mass = ?

Therefore:

m = D x V

m = 19.3 x 24

m = 463.2 g
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