How many grams of the sample will be lead-206?

A

ANS

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As uranium-238 decays, it becomes lead-206. Uranium-238 has a half-life of 4.5*109 years. After 3.5 g of uranium-238 decays for 1.125*109 years, how many grams of the sample will be lead-206?

a. 2.94 grams
b. 0.56 grams
c. 0.22 grams
d. 3.3 grams
 
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