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What is the mass of 0.20 moles of Ga^2(SO^3)3

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First, calculate the mass of 1 mole Ga2(SO3)3. Look on the periodic table, or look on the web, and it will be 2*Ga + 3*S + 9*O = ? Then 0.2 moles is 0.2 x mass 1 mol = ?

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