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OpenStudy (4meisu):
The element Gallium has two stable isotopes, Gallium-69 and Gallium-71. Gallium-69 has a molar mass of 68.9256 g/mol and Gallium-71 has a molar mass of 70.9247 g/mol. Gallium-69 has a relative abundance of 60.11% and Gallium- 71 has a relative abundance of 39.89%. What is the average atomic mass of Gallium?
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OpenStudy (anonymous):
\[68.9256*0.6011+70.9247*0.3989=69.72\frac{g}{mol}\]
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