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! :)
Activity A = λN =ln2•N/T,
N=AT/ln2=2.51•10⁵•7.55•10⁶/0.693=
=2.73•10¹² nuclei.
The mass is
m=2.73•10¹²•0.035/6.022•10²³ =
=1.6•10⁻¹³ kg