Recent content by ccl4

actually i just wanted known the product from the reation of Triethylene glycol and KOH.

what is the product of this reaction which is catalyzed by KOH?

hello, is there any relationship between the electrical charge and electrical resistance? thanks

http://www.collegeboard.com/student/testing/psat/prep.html"

well now i am in the 2. round of national selection in germany as well as in chemistry :wink: . the new tasks are really impressive, i do not have much time to relax during the vocation. well i hope that i could belong to the best 50 in the whole country, so that i can participate the one-week...

well, these questions are directly due the final solution of the problem, thus make no significant sense. because the diameter d of the tube is not given, thus the consideration of capilarity will be controversial. the temperature is not given, however the standard condition of 298 K should be...

Hi, can you help me to solve the following problem: :rolleyes: A narrow, long and glass tube opened first at both ends is dipped up to the half of its length vertically into a beaker filled with water. With a finger the upper end of the glass tube is locked and the entire glass tube is...

To extend the ideas of valence-bond theory to polyatomic molecules, we must envision mixing s, p, and sometimes d orbitals to form hybrid orbitals. The process of hybridization leads to hybrid atomic orbitals that have a large lobe directed to overlap with orbitals on another atom to make a...

hi, the way that sun generates energy is really impressive. as human we are trying to simulate the similar process, however there are two vital problems we have to overcome: 1: the necessary temperature for fussion: about 40,000,000 k! 2: the containment of the plasma.what do you think, could...

at first you have to tell me in which country you are situated, before i can give you any information about IPhO. the abilities and knowledge you need to solve the IPhO problems can normally not only be achieved at school (except eliteschools :wink: ), hence you have to do much more by your...

see here: http://en.wikipedia.org/wiki/Acetone ccl4

see here: http://en.wikipedia.org/wiki/Eutectic ccl4

taiwan is however offically a administrative part of the people's republic of China. taiwan is not overruled by the UNO. ccl4

final national selection is on May 2007, however i am ready solving the first-round problems. and i am goning to send the solutions at the begin of september. i hope that i will be qualified to participate the 2. national round. :wink: ccl4

hi i come from germany and i am going to participate international physics olympics 2007. however there are 4 rounds to choose the best 5 representatives for the country. i am interested in the system of eligibility of your countries! :wink: ccl4