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Chemistry
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Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Gaseous Radon-222 forms in soil. As it rises from the soil, it can be trapped in basements below homes. This gas, an alpha emitter, decays into Po-218, once inhaled by people it can cause lung cancer. A sample of gas is tested for Rn- 222. The 2 life of Rn-222 is 3.823 days. After 48 days the sample is -8 found to contain 3.99×10* g of Rn-222. How many grams of Rn-222 were initially present? How many grams of Po-218 have been formed?
Transcribed Image Text:Gaseous Radon-222 forms in soil. As it rises from the soil, it can be trapped in basements below homes. This gas, an alpha emitter, decays into Po-218, once inhaled by people it can cause lung cancer. A sample of gas is tested for Rn- 222. The 2 life of Rn-222 is 3.823 days. After 48 days the sample is -8 found to contain 3.99×10* g of Rn-222. How many grams of Rn-222 were initially present? How many grams of Po-218 have been formed?
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