Thursday

November 27, 2014

November 27, 2014

Posted by **Peter** on Tuesday, April 27, 2010 at 2:42pm.

- chemistry -
**DrBob222**, Tuesday, April 27, 2010 at 3:37pmk = 0.693/t

_{1/2}= 0.693/28 = ??

Substitute for k in the equation below.

ln(No/N) = kt

ln(4.00/N) = k(112)

Solve for N.

**Answer this Question**

**Related Questions**

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

chemistry - Strontium-90 has half-life of 28 years. if a 1.00-mg sample was ...

chemistry - What percent of the original sample of strontium-90 (half-life = 28....

Chemistry - Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half ...

matg - Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g ...

word problem - The half life of cesium-137 is 30 years. Suppose we have a 10-g ...

Chemistry - half life of tritium is 12.5 years. how much will remain after 100 ...

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

Chemistry - Assuming an element's half-life is 3.6 years. How much of 2 grams of...

science - the half life of tritium is 12.5 years. How much of a 1 g sample will ...