Tuesday

September 23, 2014

September 23, 2014

Posted by **Shay** on Monday, September 24, 2012 at 4:42pm.

- chemistry -
**DrBob222**, Monday, September 24, 2012 at 4:47pmln(No/N) = kt.

No = 1.000

N = 0.121

t = 67 min

solve for k, then

k = 0.693/t_{1/2}

**Answer this Question**

**Related Questions**

Science chemistry - It takes 1 hour and 17 min. for a 1.000gsample of a certain ...

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

Physics - A certian radioactive isotope has a half-life of 1 hour. If you start ...

college - a certain radioactive isotope has a half life or 850 years.how many ...

Physics check - A certain radioactive isotope has a half-life of one hour. At ...

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

s103 - the isotope caesium -137, which has a half life of 30 years, is a product...

Math - D.E.Q. - The half-life of a radioactive isotope is the amount of time it ...

math grade 12 - 2. An isotope of sodium has a half-life of 15 h. A sample of ...

MATH help - a certain radioactive isotope has a half life of approx 1,300 years...