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katrin2010 [14]
2 years ago
8

Please help im rlly stuck

Chemistry
2 answers:
atroni [7]2 years ago
7 0

Answer:

A?

Explanation:

sukhopar [10]2 years ago
3 0
I think it would be A
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Yo sup??

Let the percentage of K-39 be x

then the percentage of K-40 is 100-(x+0.01)

We know that the net weight should be 39.5. Therefore we can say

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x=24.99

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