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Chemistry Homework Help => General Chemistry => Topic started by: Nick on April 04, 2009, 07:58:29 AM
Title:
Atomic mass of element
Post by:
Nick
on
April 04, 2009, 07:58:29 AM
An element, X, has the following isotopic composition: X-200, 90%; X-199, 8.0%; and X-202, 2.0%. What is its atomic mass.
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