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發問 18 回答 0

2010-10-16 12:07 pm

The mechanism for formation of the product X is:?

2010-10-16 11:50 am

All the following statements are true except?

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?

2010-10-13 1:42 am

Which of the following statements would be correct regarding the reaction 2H2 + O2 = 2H2O?

2010-10-10 5:21 am

For the reaction CaC2(s) + 2H2O(l) = Ca(OH)2(s) + C2H2(g)?

2010-10-09 2:03 am

For the following reaction at 25 oC?

2010-10-09 12:50 am

For a reaction system which is at equilibrium, which of the following must always be true?

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?

2010-10-09 12:44 am

A reaction must be nonspontaneous at all temperatures when?

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?

2010-09-26 1:27 am

Calculate the standard heat of formation of acetaldehyde, CH3CHO(g), given the following information:?

2010-09-24 12:44 pm

Which statement concerning the following reaction is correct?

2010-09-24 12:40 pm

For a given process at constant pressure, ΔH is negative. This means that the process is ________.?

2010-09-24 12:37 pm

Consider the following specific heats of metals?

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?

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?

2008-08-01 2:00 am

倒甲手術後

2008-04-08 2:45 am

咁樣會唔會有事??”急問PLZ.. (20分)

1

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