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Step by step process Element X has three isotopes. The isotopic masses and the percent abundance of each one are presented in the following table.

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Element X has three isotopes. The isotopic masses and the percent abundance of each one are presented in the following table. The atomic mass for this element is:

Isotope

Abundance

Isotope	Abundance	Mass(UMA)
45x	32.88%	44.8776
47x	67.12%	46.9443

a.45.91 uma b.46.26 uma c.44.99 uma

d.47.89 uma

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