Sunday

February 1, 2015

February 1, 2015

Posted by **rick** on Friday, June 3, 2011 at 7:57am.

- chemistry -
**DrBob222**, Friday, June 3, 2011 at 8:02pmln(No/N) = kt

No = 100

N = 6.25

t = 24 days.

Solve for k, then substitute into the equation below.

k = 0.693/t_{1/2}and solve for t_{1/2}

**Answer this Question**

**Related Questions**

chemistry - isotope chromium -51 has a half life of 28 days. If the original ...

Chemistry - Which radioactive sample would contain the greatest remaining mass ...

chemistry - A radioactive sample contains 2.45 g of an isotope with a half-life...

chemistry - A radioactive sample contains 2.45g of an isotope wiht a half life ...

Chemistry - After 1.78 years, 1.990 g of a radioisotope remains from a sample ...

Pre-Calc - A radioactive isotope has a half life of 8.1 days. If the sample ...

half-life of radioisotope - A radioisotope has a half-life of 4 days. How much ...

chemistry - The disintegration of a radioisotope, such as I-131 to Xe-131, is ...

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

chemistry - The disintegration of a radioisotope, such as I-131 to Xe-131, is ...