標題:
chemistry
發問:
In an experiment, when sodium was heated in air, it caught fire and formed an oxide . It was found that the mass of the sample incread by 35% after heating. In another experiment when sodium was heated in pure oxygen, another oxide formed. The increase in mass was found to be 70%. Determine the empirical formulae... 顯示更多 In an experiment, when sodium was heated in air, it caught fire and formed an oxide . It was found that the mass of the sample incread by 35% after heating. In another experiment when sodium was heated in pure oxygen, another oxide formed. The increase in mass was found to be 70%. Determine the empirical formulae of the two oxides of sodium.
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最佳解答:
In the first experiment : Mass ratio Na : O = 100 : 35 Molar ratio Na : O = 100/23 : 35/16 = 4.35 : 2.18 = 2 : 1 Empirical formula = Na2O In the second experiment : Mass ratio Na : O = 100 : 70 Molar ratio Na : O = 100/23 : 70/16 = 4.35 : 2.38 = 1 : 1 Empirical formula = NaO
其他解答:
Na2O and NaO
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