# Carbon-11 has a half-life of about 20 minutes if we start with 200 grams how much will be left after 3 hours?

1 answer

###### Question:

carbon-11 has a half-life of about 20 minutes if we start with 200 grams how much will be left after 3 hours?

## Answers

a=m(1/2)^(t/h)a is the answerm is the massh is the half-lifet is the total time200*(1/2)^(180/20)=a200*(1/2)^9=a0.3906=a

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