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Chemistry, 02.10.2019 14:50 Jsquad8879

Calculate the average atomic mas of an unknown element that has two naturally-occurring 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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Calculate the average atomic mas of an unknown element that has two naturally-occurring isotopes.

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