Posted by **Kipper** on Sunday, April 4, 2010 at 6:58pm.

Radon-22 has a half life of 4 days. If you begin with 32 grams of radon, how many grams will be left after 20 days?

- 7th grade -
**drwls**, Sunday, April 4, 2010 at 7:17pm
20 days is 5 half-lives.

Divide 32 by two, five times.

That is the same as dividing 32 by 2^5.

- 7th grade -
**Kipper**, Monday, April 5, 2010 at 12:00am
thank you drwls for the help

## Answer This Question

## Related Questions

- Physical Science - 1. Which equation correctly shows beta decay? (A) 210/82 Pb...
- Chemistry - The half-life of radon-222 is 3.82 days. If a sample of gas contains...
- Science - Radium has a half-life of 1620 years and decays into radon, which has...
- chemistry - the half-life of radon-222 is 3.823 days. what was the original mass...
- chemistry - The disintegration of a radioisotope, such as I-131 to Xe-131, is ...
- ALGEBRA - You have 480 grams of a radioactive kind of tin. If its half-life is ...
- Physical Science- Help Please! - Suppose that you are given a 100 gram sample of...
- Chemistry - If radon-222 has a half-life of 3.8 days, determine how long it ...
- Chemistry - A 1.50- gas sample at 722 and 25.0 contains 7.56 radon-220 by volume...
- Chemistry. Half Life Problem. Help Plz - If the half-life of iodine-131 is 8 day...

More Related Questions