用戶232090

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用戶232090
回覆: 2
2010-10-16 12:07 pm
The mechanism for formation of the product X is:?
用戶232090
回覆: 2
2010-10-16 11:50 am
All the following statements are true except?
用戶232090
回覆: 1
2010-10-13 1:49 am
The mechanism for the reaction between nitrogen dioxide and carbon monoxide is proposed to be a single step: N?
用戶232090
回覆: 2
2010-10-13 1:42 am
Which of the following statements would be correct regarding the reaction 2H2 + O2 = 2H2O?
用戶232090
回覆: 1
2010-10-10 5:21 am
For the reaction CaC2(s) + 2H2O(l) = Ca(OH)2(s) + C2H2(g)?
用戶232090
回覆: 1
2010-10-09 2:03 am
For the following reaction at 25 oC?
用戶232090
回覆: 2
2010-10-09 12:50 am
For a reaction system which is at equilibrium, which of the following must always be true?
用戶232090
回覆: 2
2010-10-09 12:47 am
The heat of vaporisation of methanol, CH3OH, is 36.8 kJ/mol. Its boiling point is 64.7 oC. The change in entro?
用戶232090
回覆: 1
2010-10-09 12:44 am
A reaction must be nonspontaneous at all temperatures when?
用戶232090
回覆: 2
2010-10-09 12:42 am
At 2200 K the reaction CaO(s) + SO3(g) = CaSO4(s) is nonspontaneous, whereas it is spontaneous at room tempera?
用戶232090
回覆: 1
2010-09-26 1:27 am
Calculate the standard heat of formation of acetaldehyde, CH3CHO(g), given the following information:?
用戶232090
回覆: 1
2010-09-24 12:44 pm
Which statement concerning the following reaction is correct?
用戶232090
回覆: 2
2010-09-24 12:40 pm
For a given process at constant pressure, ΔH is negative. This means that the process is ________.?
用戶232090
回覆: 1
2010-09-24 12:37 pm
Consider the following specific heats of metals?
用戶232090
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2010-09-08 2:35 pm
A silicon solar cell array, with a collection efficiency of 13%, is required to produce 1.5 kW of power to run?
用戶232090
回覆: 3
2010-09-08 2:20 pm
A silicon solar cell array works at an efficiency of 8.1% in sunlight and is exposed to an average solar insol?
用戶232090
回覆: 1
2008-08-01 2:00 am
倒甲手術後
用戶232090
回覆: 4
2008-04-08 2:45 am
咁樣會唔會有事??”急問PLZ.. (20分)
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