close
標題:

CHEM 計mole 既數

發問:

When sodium is heated in air, it catches fire and forms an oxide. If the sample is weighed before and after reaction, it is found to increase in mass by approximately 35%. On the other hand , when sodium is heated in pure oxygen, the reaction takes place more readily and the increase in mass is about 70%. Work out... 顯示更多 When sodium is heated in air, it catches fire and forms an oxide. If the sample is weighed before and after reaction, it is found to increase in mass by approximately 35%. On the other hand , when sodium is heated in pure oxygen, the reaction takes place more readily and the increase in mass is about 70%. Work out the empirical formulae of the two oxides of sodium. 唔識計唔該幫幫手!! 唔該要有steps!!! 唔該晒(:

aa.jpg

 

此文章來自奇摩知識+如有不便請留言告知

最佳解答:

Consider the first oxide. Mole ratio Na : O = 100/23 : 35/16 = 4.35 : 2.19 ≈ 2 : 1 Empirical formula of the first oxide = Na2O Consider the second oxide. Mole ratio Na : O = 100/23 : 70/16 = 4.35 : 4.38 ≈ 1 : 1 Empirical formula of the second oxide = NaO

其他解答:
arrow
arrow
    文章標籤
    麻煩幫 更多 要有 文章 奇摩
    全站熱搜

    lgzrelv 發表在 痞客邦 留言(0) 人氣()

    E-mail轉寄