A rock from the moon was found to contain 1.0 * 10-5 g of uranium-238 and 4.0 * 10-6 g lead-206.All of the lead-206 came from the decay of uranium-238.The half-life for this decay is 4.5 * 109 years.How old is this rock?
A) 1.0 * 106 years
B) 3.3 * 107 years
C) 4.1 *108 years
D) 2.5 * 109 years
E) 4.1 * 1010 years
Correct Answer:
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