Question

a. The half-life of tritium is 12.3 years. How long does it take for a 48.0g sample to be reduced to 2.0g? Answer using equation(s).

b. A radioactive sample of 100. g has been reduced to 1.56g in 85 years. How long is the half-life? Answer using approximations, giving your best educated guess for answer (do not use equations).

c. A radioactive sample of 100. g has been reduced to 1.56g in 85 years. How long is the half-life? Answer using equation(s).

d. 13N decays with a half-life of approximately 10 min to produce 13C, a stable isotope of carbon. For a 1.0g sample of 13N, after one half-life, what mass of 13N remains? What has happened to the remaining mass?

Answer 1

Solution