Friday

February 27, 2015

February 27, 2015

Posted by **fatin** on Tuesday, September 14, 2010 at 7:57pm.

- chemistry -
**DrBob222**, Tuesday, September 14, 2010 at 8:04pmln(100/12.5) = k*18

Solve for k, then

k = 0.693/t(sub>1/2.

Solve for t_{1/2}.

- chemistry corr'n -
**DrBob222**, Tuesday, September 14, 2010 at 8:05pmk = 0.693/t

_{1/2}

**Answer this Question**

**Related Questions**

Chemistry - Gallium65, a radioactive isotope of gallium, decays by first order-...

Radioactivity or science - A radioactive isotope source has a mass of 120ug. If ...

Radioactivity - How are the terms "activity" and "becquerel" related? A ...

Chemistry - I've figured out most of it. I'm not sure how to find the percentage...

Chemistry - As a sample of the radioactive isotope 131 I decays, its half-life a...

chemistry - If there are 80 milligrams of a radioactive element decays to 10 ...

College Algebra - Use a calculator to help solve the problem. One isotope of ...

college algebra - One isotope of holmium, 162Ho, has a half life of 22 minutes. ...

Chemistry - If 30% of a sample of radioactive isotope decays in 24 hrs, what is ...

Chemistry - A 208 g sample of sodium-24 decays to 13.0 g of sodium-24 within 60....