Posted by **Molly** on Wednesday, December 5, 2012 at 4:13pm.

Suppose that you are given a 100 gram sample of a radioactive substance with a half-life of 32 days. How many grams will be left after 192 days?

- Physical Science- Help Please! -
**Steve**, Wednesday, December 5, 2012 at 4:14pm
192 days is 6 half-lives.

(1/2)^6 = 1/64

1/64 * 100 g = 1.5625 g

- Physical Science- Help Please! -
**alisa**, Tuesday, April 28, 2015 at 11:16am
Carbon 14 has a half-life of 5,730 years. How long will it take for 400 grams of carbon 14 to decay to the point that only 100 grams are carbon 14.

## Answer this Question

## Related Questions

- calculus - The rate at which an amount of a radioactive substance decays is ...
- math - You have just isolated a new radioactive element. If you can determine ...
- 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 ...
- earth science - if carbon 14 has a half life of 24 days how much would be left ...
- Physics - Suppose a hypothetical radioactive nucleus (Hy) has a half-life of 10 ...
- 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 ...
- Pre-Calc - A radioactive isotope has a half life of 8.1 days. If the sample ...
- ALGEBRA - You have 480 grams of a radioactive kind of tin. If its half-life is ...