Wednesday

November 26, 2014

November 26, 2014

Posted by **lan** on Thursday, November 29, 2012 at 3:43pm.

- earth science -
**Damon**, Thursday, November 29, 2012 at 4:19pmx = Xi e^-kt

1/2 = e^-24 k

ln .5 = -24 k

-.693 = -24 k

k = .0289

so

x = 220 e^-.0289*168

= 220 * .00779

= 1.71 grams

**Answer this Question**

**Related Questions**

earth science - if carbon 14 has a half life of 24 days how much would be left ...

earth science - if carbon 14 has a half life of 24 days how much would be left ...

Physical Science- Help Please! - Suppose that you are given a 100 gram sample of...

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 ...

calc - The half-life of polonium is 139 days, but your sample will not be useful...

Science Half Lives - I am confused about how to claculate half lives. Can you ...

physics - The half life of a radioactive sample is 6.93 days.after how many days...

Chemistry - A radioactive element has a half-life of 6.41 days. What percent of ...

Science/Chemistry - 22Na has a half-life of 951 days. How many grams of a 1.00 ...