close

標題:

About Reacting Masses (20點*)

aa.jpg

 

此文章來自奇摩知識+如有不便請留言告知

發問:

Caffeic acid is found in coffee beans.The molar mass of caffeic acid is found to be 180.2 gmol-1. Caffeic acid is found to contain 35.5% oxygen. How many oxygen atoms are present in one molecule of caffeic acid? [Relative atomic mass of O=16]

最佳解答:

Relative molecular mass of a ceffeic acid = 180.2 in which 180.2 x 35.5% = 63.97 units are contributed by oxygen Hence there are 4 oxygen atoms in one molecule of caffeic acid.

其他解答:

arrow
arrow
    文章標籤
    公式 跑得快 文章 奇摩
    全站熱搜
    創作者介紹
    創作者 ohe09nz81r 的頭像
    ohe09nz81r

    ohe09nz81r的部落格

    ohe09nz81r 發表在 痞客邦 留言(0) 人氣()

    E-mail轉寄