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thanks for your help! An unknown element X has the following isotopes: 58(68.00% abundant ),60X(26.00% abundant ),62X(6.00% abundant ). What is the average atomic mass

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An unknown element X has the following isotopes: 58(68.00% abundant ),60X(26.00% abundant ),62X(6.00% abundant ). What is the average atomic mass in amu of X

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