Question #133252

2. (5 points ) A living - pound woman contains about 6 x 10 grams of carbon- 14 How many grams of carbon- 14 would remain after 17100 years? What has happened to the rest of the carbon -147 (Assume carbon- 14 is a beta emitter with a half of 5700 years .)

Expert's answer

N_{i}=initial Mass =60g

N_{f}=Final Mass

"n" =Half life

Half life("n") ="\\frac{17100}{5700}" =3 half lifes

"N_f=N_i(0.5)^{3}"

N"_f" =60(0.5)^{3}=**7.5g**

The carbon 14 decays hence a decrease because it is unstable.

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