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Sodium Bicarbonate = NaHCO3 Molecular weight = Summation of individual molecular weights of elements =
[(1)(22.99 g/mol) ] + [(1)(1.01 g/mol)] + [(1)(12.01 g/mol)] + [(3)(15.99 g/mol)] =
84.01 g/mol


So,


(86.6 g) / (84.01 g/mol) = 1.031 mol

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