Chemistry, 07.09.2020 18:01 hellicuh

If 75% of the isotopes of an element have a mass of 45.0 amu and 25% of the isotopes have a mass of 47.0 amu, what is the atomic mass of the element?

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If 75% of the isotopes of an element have a mass of 45.0 amu and 25% of the isotopes have a mass of...