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Unformatted text preview: The molar mass of the unknown metal M was determined by using molar ratios and the masses of the two other elements (oxygen and nitrogen) in the compound. .009513 mol of Nitrogen = .009513 mol of MNO 2 .009513 x .816g MNO 2 = 90.5g MNO 2 The molar weights of oxygen and nitrogen were subtracted. 90.5g MNO 2 14g N 32g O = 44.5g M 44.5g = element Scandium Conclusion: The unknown metal was identified as Scandium 2...
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