Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Students have asked these similar questions
The radioactive isotope Carbon-14 has a half-life of 5,730
years. Given 300 grams of C-14, what is the remaining mass
(in grams) of the isotope after 250 years have elapsed?
A) 291.06g
B) 8.94g
C) 97.02g
D) 202.98g
Find the average binding energy per nucleon of 2 Mo and 82 Kr. (For the atomic masses, see this table. Enter your answers to at least two decimal places.)
42
36
(a)
92 Mo
42
MeV/nucleon
82
(b)
Kr
36
MeV/nucleon
A moon rock collected by a U.S. Apollo mission is estimated to be 4.40 billion years old by uranium/lead dating. Assuming that
the rock did not contain any lead when it was formed, what is the current mass of 0Pb in the rock, if it currently contains
1.460 g of 238 U? The half-life of 238U is 4.47 x 10° years.
206 Pb mass:
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