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rozabelikov
 one year ago
Calculate the average atomic mass of an unknown element that has two naturallyoccurring isotopes. The first isotope occurs 75.47% of the time and has a mass of 248.7 a.m.u. The second isotope occurs 24.53% of the time and has a mass of 249.4 a.m.u.
rozabelikov
 one year ago
Calculate the average atomic mass of an unknown element that has two naturallyoccurring isotopes. The first isotope occurs 75.47% of the time and has a mass of 248.7 a.m.u. The second isotope occurs 24.53% of the time and has a mass of 249.4 a.m.u.

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primeralph
 one year ago
Best ResponseYou've already chosen the best response.1dw:1368208509576:dw
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