# Science math

posted by .

Suppose a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 1104 days? How much polonium is in the sample 1104 days later?

• Science math -

1104/138 = 8 half-lives
after 8 half-lives, 1/256 remains, or 0.148g

• Science math -

How many half-lives of polonium-210 occur in 1104 days? 1104/138 = 8.0 half-lives

How much polonium is in the sample 1104 days later? 38 g * (1/2)^8 = 0.148 g

• Science math -

Thank you both very much.

• Science math -

8; 2,622 g

• Science math -

8; 0.11

• Science math -

8';0.148

## Similar Questions

1. ### calc

The half-life of polonium is 139 days, but your sample will not be useful to you after 95 % of the radioactive nuclei present on the day the sample arrives has disintegrated. For about how many days after the sample arrives will you …
2. ### Science

How many days will it take for 3/4 of a sample of polonium 210 to decay?
3. ### Math

How long will it take for a 1 g sample of Polonium 210 to lose all but 1/28 of its radioactivity if the half-life is 140 d?
4. ### integrated math

Suppose a laboratory has a 26 g sample of polonium-210. The half-life of polonium-210 is about 138 days.?
5. ### science

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days?
6. ### sciencemath

Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days?
7. ### physics

How long will it take a sample of polonium-210 with a half-life of 140 days to decay to one-sixty-fourth of its original strength?
8. ### algebra

Consider that the half-life of Polonium-210 is 140 days.What approximate daily percentage of decay does Polonium-210 demonstrate?
9. ### Chemistry

In 2006, Soviet dissident Alexander Litvinenko was murdered when Polonium-210 was added to his tea; he died three weeks later. Polonium-210 is an alpha emitter. What other product is formed?
10. ### Chemistry

Static charge can interfere with the production of plastic products by attracting dust and dirt. to reduce it, manufacturers expose the area to polonium-210, which has a half-life of 138 days. How much of a 25.0-g sample will remain …

More Similar Questions