Answered

Discover a wealth of knowledge at Westonci.ca, where experts provide answers to your most pressing questions. Get detailed and precise answers to your questions from a dedicated community of experts on our Q&A platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

Suppose the amount of a certain radioactive substance in a sample decays from 8.00mg to 3.30mg over a period of 20.9 years. calculate the half life of the substance. round your answer

Sagot :

Answer:

N = N0 e^-λ t       basic equation for radioactive decay

N / N0 = e^-λ t

ln N / N0 = ln 3.3 / 8.0 = - 20.9 λ

λ = .886 / 20.9 = .0424

T(1/2) = .693 / .0424 = 16.4 yrs       half life

Check   20.9 / 16.4 = 1.27 half lives

2^1.27 = 2.41    will decay to 1 / 2.41 in 20.9 yrs

3.3 * 2.41 = 7.95

Visit us again for up-to-date and reliable answers. We're always ready to assist you with your informational needs. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Get the answers you need at Westonci.ca. Stay informed by returning for our latest expert advice.