Friday

October 31, 2014

October 31, 2014

Posted by **Clarissa** on Thursday, September 17, 2009 at 7:42pm.

- physical science -
**DrBob222**, Thursday, September 17, 2009 at 7:49pmk = 0.693/t

_{1/2}

Then substitute k into the equation below.

ln(No/N) = kt

No = 24

N = solve for this

k from top equation

t = 15,000

Post your work if you get stuck.

Of course the much easier way is to say you go through three half lives so you are left with 1/8 of 24 = 3 grams.

**Answer this Question**

**Related Questions**

physical science - If you have 24 grams of an unstable atom with a half life of...

phy sci 101 - If you have 24 grams of an unstable atom with a half life of 5,000...

Physics - Suppose you have 100 g of radioactive plutonium-239 with a half-life ...

Physics - Suppose you have 100 g of radioactive plutonium-239 with a half-life ...

science - suppose you have 100grams of radioactive plutonium-239 with a half-...

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

Science - How much of a radioactive material with a half-life of 12,000 years is...

earth science - what would be the chart to use for carbon 14 whcih has a half ...

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

Science - If a 20 gram sample of a radioactive substance has a half-life of 6000...