[情報] 農化普化題目看不到的請看這

[justinhsu13 (98只有我姓許)]

看來還是逃不掉的
還是得打成BBS模式
有問題請再說

1. Describe a method to remove SO2 from the exhaust from fossil fuel burning.

Ans.:
CaCO3(s) → CaO(s)+CO2(g)
CaO(s)+SO2(g) → CaSO3(s)↓
2CaO(s)+SO2(g)+O2(g) → 2CaSO4(s)↓

2. The half-life of Rn-222 is 3.8 days.
   Starting with the radioactivity level of 10 pC due to Rn-222,
   how long is it before the radioactivity level decreases to 4 pC,
   the up-limit value recommended by EPA?
   ( pC means 3.70*10-2 disintegrations of radioactive nuclei per second.)

Ans.:
10 pC *(1/2)^(t/3.8) = 4 pC
t=5.0 days

3. Explain why photochemical smog is often with reddish color?
   (Hint: The color is due to a certain product in reaction.)

Ans.:
The reddish color of photochemical smog is due to the red color of NO2(g).
N2(g)+O2(g) → 2NO(g)
2NO(g)+O2(g) → 2NO2(g)  (Red)

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※ 編輯: justinhsu13     來自: 140.112.199.163      (05/13 23:47)
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