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September 5, 2015

Homework Help: chemistry

Posted by micky on Monday, January 16, 2012 at 5:35pm.

an original sample of K-40 has a mass of 25.00 grams. After 3.9x 10 to the ninth years, 3.125 grams of the original sample remains unchanged. What is the half-life ok K-40 in minutes?

Is it 6.8328 x 10 to the 14th

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