作者katiekatie (小白豬)
看板NTUE_Nse97
標題Re: [閒聊] 好心人士..
時間Sun Oct 8 18:10:54 2006
※ 引述《katiekatie (小白豬)》之銘言：
: ※ 引述《vickybear68 (熊)》之銘言：
: : 有沒有哪位好心人士可以把禮拜三要交的分析作業題目po在板上呀!
: : 我深怕我禮拜二回家會很晚了...
: : 作業來不及寫...
: : po文可以賺逼幣唷!!
: : 幫幫我吧!!!
: : 一想到要回台北就頭痛呀!!
: : 塞塞塞塞塞.......= =
: 5-8:A method of analysis yields weights for gold that are low by 0.4mg.
: Calculate the percent relative error caused by this uncertainty if
: the weight of gold in the sample is
: *(a)700mg. (* -0.06% )
: (b)450mg.
: *(c)250mg. (*-0.2% )
: (d)40mg.
: 5-9:The method described in Problem5-8 is to be used for the analysus of
: ores that assay about 1.2% gold. What minimum sample weight should be
: taken of the relative error resulting from a 0.4-mg loss is not to exceed
: *(a)-0.2% (* 17g )
: (b)-0.5%
: *(c)-0.8% (* 4g )
: (d)-1.2%
: 5-11:A loss of 0.4 mg of Zn occurs in the course of an analysis for that
: element. Calculate the percent relative error due to this loss if the
: weight of Zn in the sample is
: *(a)40mg (* -1.0% )
: (b)175mg
: *(c)400mg (* -0.10% )
: (d)600mg
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1F：→ katiekatie:答案已經補在選項後面了呦!!! 10/08 18:11
2F：推 magic66:辛苦囉~雖然我用不到~但是還是要大力推一下^^ 10/08 18:46
3F：推 conective:我推 10/08 21:38
4F：推 KEBT:謝謝 朱姊 10/08 22:34
5F：推 ccooddaa:!!!!我算不出來= = 10/10 16:29
6F：推 ccooddaa:哈哈哈~寫完了~好簡單= =....我笨了 10/11 01:02