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Chemistry
Nancy Wang
15 September, 07:58
What is the mass number of Ce
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Rogelio Collier
15 September, 10:46
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The answer is 140.116 u + / - (plus or minus doesnt matter) 0.001
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Trevon Williamson
15 September, 11:34
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140.116 u ± 0.001 u is the answer
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