A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. H

Question

3 years ago

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A sample taken from a layer of mica in a canyon has 2.10 grams of potassium-40. A test reveals it to be 2.6 billion years old. H

ow much
potassium-40 was in the sample originally if the half-life of potassium-40 is 1.3 billion years?
A. 4.20
B. 8.40 g
c. 12.6 g
D. 16.8 g
E. 25.2 g

Chemistry

2 answers:

Katyanochek1 [597] · Answer 1 · 2022-05-22T12:59:23+03:00

Katyanochek1 [597]3 years ago

8 0

Answer:

The correct answer is b

Explanation:

Arte-miy333 [17] · Answer 2 · 2022-05-22T14:56:24+03:00

Arte-miy333 [17]3 years ago

4 0

Answer:

Correct Answer is (B)

Explanation:

Got it right on plato Chemistry Post test

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