potassium係burn in lilac flame
32係A
H2O會condense變liquid
唔計volume
37係D
release既heat double左但mass of water都double
e=mc delta T
increase in temperature冇變
x同y同energy一樣但mass of water得一半
increase in temperature會大左 其實諗下都知
同樣既energy去heat一杯水
mass細d升溫一定快d 比前兩年都易左 原帖由 HX273 於 2008-5-1 08:42 發表 http://hkitalk.net/HKiTalk2/images/common/back.gif
我唔記得咗乜metal係burn in golden yellow flame,請解答。
sodium
舊年果份Chem真係難到嘔電,搞到MC錯十一二條都A到 原帖由 HX273 於 2008-5-1 18:27 發表 http://hkitalk.net/HKiTalk2/images/common/back.gif
舊年果份Chem LQ難唔難?
難過今年
有d point好難答
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