F.3有關化學~

👨🏻‍🏫 學術台化學

TWM

2007-10-04 3:59 am

判別以下是元素、混合物還是化合物。試解釋你的答案。
A.黑色液體,分離成多種不同沸點的液體
B.無色液體,被電流分解成兩種氣體
THX~

更新1:

試解釋你的答案。(為什麼?)

更新2:

請用中文作答

回答 (6)

用戶237090

2007-10-10 7:42 am

✔ 最佳答案

a:混合物(好明顯就係石油啦=.=)因為佢係由(不同沸點)呢樣野去分解冇經過化學嘅方法去分解!!(同空氣分解方法嘅原理一樣)
B:化合物(好明顯就係水啦=.=)用電解就即係有經過化學嘅方法去分解啦!!

(都因為((不同沸點))係唔會分解到b呢樣野嘅)

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Emerson

2007-10-05 4:50 am

a=mixture
b=compound

because of the words used in a and b are different. the one in a is "seperate" and b is "electrolyze"

that means a is physically mixed while b is chemically mixed.

therefore a is mixture wile b is a compound

(i am quite sure that b is water)

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