作者hizone (盛夏的果实)
看板Chemistry
标题请教两题普化
时间Sun Jun 11 07:35:00 2006
又要麻烦各位高手了~
(1)
2NO(g)＋Br2(g)→2NOBr(g)
由实验可知其Rate ＝ 12000﹝NO﹞2﹝Br2﹞
What is the rate of disappearance of Br2 when ﹝NO﹞=0.075M and ﹝Br2﹞=0.25M?
他给的解答是8.4M/S
(2)
Atmospheric CO2 levels have risen by nearly 20﹪over the past 40 years
from 315ppm to 375ppm.
(a)Give that the clean rain today is 5.4,determine the pH of
unpolluted rain 40 years ago. Assume that H2CO3 is the factor
influencing pH.
CO2 (g)+ H2O(l)→ H2CO3(aq)
(b)What volume of CO2 at 25℃ and 1atm is dissolved
in a 20.0L bucket of today's rainwater?
他给的解答(a)是pH=5.440 (b)0.02L
麻烦各位了!
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