Monday

March 30, 2015

March 30, 2015

Posted by **sara** on Sunday, May 11, 2014 at 9:29pm.

I don't understand at all what to do here

- chemistry -
**Devron**, Sunday, May 11, 2014 at 9:45pmUse the following formula:

T1/2 = T*ln(2)/ln(Ao/At)

Where

T1/2=0.03920 years

T=?

Ao=100%

and

At=53.25%

Solve for T:

(T1/2)/[[ln(2)/ln(Ao/At)]= To

To=(0.03920)/[ln(2)/ln(100/53.25)]

Answer contains four significant figures.

- chemistry-Additional Steps -
**Devron**, Sunday, May 11, 2014 at 9:59pmThe answer that is given to you will be in years.

Take To and do the following with it:

To*(365 days/1 year)*(24hrs/1 day)*(60mins/1 Hr)= answer in minutes.

Remember, no more than four significant figures.

**Answer this Question**

**Related Questions**

Chemistry - 32P is a radioactive isotope with a half-life of 14.3 days. If you ...

chem - Radioactive substances decay by first-order kinetics. How many years ...

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

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

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

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

chemistry - The isotype caesium -137, which has a half life of 30 years, is a ...

Science- Radioactive Dating - Which of the following statements about ...

chemistry - How long will it take for 25% of the C-14 atoms in a sample of C-14 ...

Calc - A sample of a radioactive substance decayed to 93.5% of its original ...