Question

a 16 gram sample of a substance thats used too treat thyroid disorders has a k value of 0.125. find the substances half life in days, and round your answer to the nearest 10th.

Answer 1

The k value is actually -0.125

k value = natural log (.5) / Half-Life
Half Life = -.69314718056 / k
Half Life = -.69314718056 / -0.125
Half Life = 5.5451774445 days

Half Life = 5.5 days (rounded)

Source:1728.com/halflif2.htm