SOLUTION: An isotope of strontium, Sr-90, has a half-life of 25 year. Find the mass of Sr-90 remaining from a sample of 18mg after 125 years

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Question 1173758: An isotope of strontium, Sr-90, has a half-life of 25 year. Find the mass of Sr-90 remaining from a sample of 18mg after 125 years
Answer by ikleyn(52803)   (Show Source): You can put this solution on YOUR website!
.

125 years is 5 (five) half-lives.


THEREFORE, the remaining sample mass after 125 years will be   mg =  mg =  mg =  mg = 0.5625 mg.    ANSWER

Solved.

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