Posted by Monique on Saturday, November 26, 2011 at 11:38am.
A radioactive sample contains 2.45g of an isotope wiht a half life of 3.8 days. How much of the isotope in grams remains after 11.4 days?
please explain

chemistry  DrBob222, Saturday, November 26, 2011 at 12:58pm
k = 0.693/t_{1/2}
Solve for t_{1/2} and substitute into the equation below.
ln(No/N) = kt
No = starting grams = 2.45 g
N = ending amount. Solve for this.
k = from above calculation.
t = 11.5 days.

chemistry  Anonymous, Thursday, March 7, 2013 at 6:03am
0.30625

chemistry  saviour, Thursday, July 28, 2016 at 6:05am
100g of radioactive mass has a half life of 5days.calculate the mass decayed off aafter 15days

chemistry  saviour, Thursday, July 28, 2016 at 6:08am
100g of radioactive mass has a half life of 5days.calculate the mass decayed off aaftGood day sir, My Name is Oyindamola from Enterprise ware Technologies(Mr Seun AinaScottâ€™s Company)
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