Problema Solution
The radioactive element americium-241 has a half-life of 432 years. Suppose we start with a 25-g mass of americium-241.
How much will be left after 231 years? Compute the answer to three significant digits.
Answer provided by our tutors
Mass left after 231 years = 25*(1/2)^(231/432)= 17.26 g
So Mass left after 231 years is 17.26 g