Posted by **Leila** on Tuesday, May 7, 2013 at 6:51pm.

The activity of a sample of 35(upper#) 16(lower#)Sulfer (T 1/2= 7.55x10^6 s) is 2.51x10^5 decays per second.

WHat is the mass of the sample?

m= in grams

PLease help me out...Thank you! :)

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