查看完整版本 : Chem

美利堅鄉土仔 2016-7-9 01:04 PM

Chem

[attach]5721718[/attach]



[url=http://www.discuss.com.hk/iphone][img=100,23]http://i.discuss.com.hk/d/images/r10/iphoneD.jpg[/img][/url]

wind0207 2016-7-9 01:52 PM

CO2 has 27.2912% of C in mass.
2.328g CO2 has 0.6353g of C.
0.7420g of CHx has 85.62% of C in mass.
Which gives CH2 as the formula that fit the mass %.

3個進擊的膠袋 2016-7-15 01:35 AM

ANS

Mass of carbon= 2.328 X 12/44 = 0.635 g
Mass of hydrogen= 0.742 - 0.635= 0.107 g[table=50%][tr][td] [/td][td] C[/td][td] H[/td][/tr][tr][td] Mass[/td][td] 0.635g        [/td][td] 0.107g[/td][/tr][tr][td] no. of mole[/td][td] 0.635/12=0.0529[/td][td] 0.107[/td][/tr][tr][td] mole ratio[/td][td]1[/td][td]2[/td][/tr][/table]
頁: [1]
查看完整版本: Chem