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OpenStudy (anonymous):
gallium has an atomic mass of 69.723 amu. the ga-69 (68.926 amu) is 60.11%. what is the amu of the other isotope? Please explain.
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OpenStudy (aaronq):
you can set up 2 equations and sub one into the other. \(m_T=69.723~amu=m_{68}*0.6011+m_{69}*\% abundance_{69}\) and \(0.6011+\%abundance_{69}=1\)
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