Question: A fictitious element that has two isotopes has an average atomic mass of 143.2. If 29.74% of the atoms of the element have an atomic

A fictitious element that has two isotopes has an average atomic

A fictitious element that has two isotopes has an average atomic mass of 143.2. If 29.74% of the atoms of the element have an atomic mass of 146.8, what is the atomic mass of the other isotope

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