a fictitious element z has an average atomic mass of 223.07 u. element z has two naturally occuring…

a fictitious element z has an average atomic mass of 223.07 u. element z has two naturally occuring isotopes. the more abundant isotope has an exact mass of 224.64 u and a relative abundance of 60.33%. calculate the exact mass of the second isotope. mass of second isotope:

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