Wednesday

October 1, 2014

October 1, 2014

Posted by **Michelle** on Friday, March 1, 2013 at 2:44am.

- Chemistry -
**Devron**, Friday, March 1, 2013 at 3:14am(100)*1/2^n=1

Solve for n

1/2^n=1/100

2^n=100

n=ln(100)/ln(2)

n* the number of days (11.4) =should give you the length of time it takes for Radium-223 to decrease to 1.00% of its initial value.

- Chemistry -
**Michelle**, Friday, March 1, 2013 at 3:40am75.7 days

**Answer this Question**

**Related Questions**

calculus - The half-life of Radium-223 is 11.43 days. If a sample has a mass of...

Chem 3A - please help me with this chemistry problem. Half-Life A radium-226 ...

chemistry - A radium-226 sample initially contains 0.112mol. How much radium-226...

Math - Exponential Decay - Radium decays exponentially. Its half-life is 1,690 ...

Math - In 1976 a research hospital bought half a gram of radium for cancer ...

Math - In 1976 a research hospital bought half a gram of radium for cancer ...

Pre Calculus - Radium-221 has a half-life of 30 s. How long will it take for 95...

Science - Radium has a half-life of 1620 years and decays into radon, which has...

chemistry - The half-life for the radioactive decay of calcium-47 is 4.5 days.If...

nuclear chem - i need help solving this. Can you guys show me how it's done. ...