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what is the minimum of amount of KCN in moles needed to extract 29 grams of gold
12 years ago

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DrBob222
Au + 2CN^- ==> Au(CN)<sup>-</sup><sub>2</sub)
Convert 28g Au to mols. mol = grams/atomic mass.
Use the coefficients to convert mols Au to mols CN^-(KCN).
Then convert mols KCN to grams. g = mols x molar mass.
12 years ago

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