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12-03-2019
Chemistry

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Thehalf life of carbon is 5730 years. how many years would it take a 200 gram sample to Decay to only 25 G?

Thehalf life of carbon is 5730 years how many years would it take a 200 gram sample to Decay to only 25 G class=

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ChemBen ChemBen

23-03-2019

When a half-life passes, only half of the mass of the sample stays. So to get to 25 g from 200, let's see how much half-lives will pass.

200÷2=100

100÷2=50

50÷2=25

The answer to that is 3 half-lives, or

3 × 5730 = 17190 years

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