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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. How much potassium-40 was in the sample originally if the half-life of potassium-40
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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. How 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

User Mysterywood
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2 Answers

5 votes

Answer:

Correct Answer is (B)

Step-by-step explanation:

Got it right on plato Chemistry Post test

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User Bbengfort
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2 votes

Answer:

The correct answer is b

Step-by-step explanation:

User Jinnie
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