Pls give me the answer and explain to me .......
Thank you!!!!!
Question:
Coppre have 2 isopos (63 Cu and 65 Cu)...........
And the >>Reality mass<< is 63.15
then ?%--->63 Cu
A question of "Relative Atomic Mass "inF.3
2007-06-04 12:44 am
回答 (2)
2007-06-04 6:44 am
✔ 最佳答案
let x be the % of 63 cu63x + 65 ( 1-x) = 63.153
63x + 65 - 65x = 63.153
1.847 = 2x
x = 0.9235
therefore,
63 cu = 92.34%
參考: 我的腦和化學知識
2007-06-10 5:33 am
你可以設63 Cu既relative atomic mass係x
咁就會出左一條equation出泥:
63*x+65*(1-x)=63.15
咁因為設左63 Cu既mass係x啦咁所以65 Cu既mass就會係65*(1-x)
63x+65-65x=63.15
65-63.15=65x-63x
2x=1.85
x=0.925
咁所以63Cu 既relative atomic mass就會係92.5%
希望幫到你!!(;
咁就會出左一條equation出泥:
63*x+65*(1-x)=63.15
咁因為設左63 Cu既mass係x啦咁所以65 Cu既mass就會係65*(1-x)
63x+65-65x=63.15
65-63.15=65x-63x
2x=1.85
x=0.925
咁所以63Cu 既relative atomic mass就會係92.5%
希望幫到你!!(;
參考: 自己-
收錄日期: 2021-04-13 00:34:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070603000051KK03165