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Gallium arsenide, GaAs, has gained widespread use in semiconductor devices that interconvert light and electrical signals in fiber-optic communication systems. Gallium consists of 60.% 69Ga and 40.% 71Ga. Arsenic has only one naturally occurring isotope, 75As. Gallium arsenide is a polymeric material, but its mass spectrum shows fragments with formulas GaAs and Ga2As2. What would the distribution of peaks look like for these two fragments?

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