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Messages 13593 - 13624 of 13928   Oldest  |  < Older  |  Newer >  |  Newest
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13593
daer Friends. This has been bugging me for sometime; it is said that when elements react to form compounds or different compounds react to form some other...
retro_rat09
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Feb 1, 2009
10:44 am
13594
H2N-CH2-COO- + 2H+ ===> (+)H3N-CH2-COOH Atomic weights: C=12 H=1 O=16 N=14 C2H4O2N=74 (for glycinate anion) Let glycine be called Gly. Let the HCl solution...
Steve
steve_geo1
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Feb 1, 2009
9:57 pm
13595
hello I am from Iraq I prepared some complexes . Can any one help me to measur a sigle crystals and please how much the money for each analysis Regards to...
amertaqa
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Feb 2, 2009
7:06 am
13596
Hello, What are ingradients of essense sticks? ManyThanks,...
shailendra Indulkar
indulkarshailu
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Feb 2, 2009
10:18 am
13597
Best wishes M.A. Gharacheh ... From: amertaqa <amertaqa@...> Subject: [The Chemistry Cluster] x-ray To: thechemistrycluster@yahoogroups.com Date: Monday,...
mohsen ahmadi
zn_dew81
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Feb 2, 2009
10:52 am
13598
Some crystals are cubic and some are long and thin. To measure the thickness of a crystal, you can use a micrometer which is easy to buy for $15 in a large...
BRIAN JENSEN
brianedwardj...
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Feb 2, 2009
2:41 pm
13599
Hello, Does someone ask: what's happened when the potential difference between electrodes in a electrolytic cell is lower then that necessary for electrodes...
sorincosofret
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Feb 3, 2009
9:47 am
13601
Draft paper submission deadline extended: BCBGC-09 The deadline for draft paper submission at the 2009 International Conference on Bioinformatics,...
John Edward
jeedward
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Feb 4, 2009
9:34 pm
13602
Dear Brian Jensen Thank you for reply the problem is in the instrument (ligt camera) not found in Iraq I asket to help me to the measure the sample . ...
amer taqa
amertaqa
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Feb 5, 2009
5:56 am
13603
السلام عليكم فال الله - عز وجل- )فاقرؤ ما تيسر من القرآن علم أن سيكون منكم مرضي وآخرون...
abdallah khlil
abdoo_khlil
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Feb 5, 2009
6:21 am
13604
hi guyz, i've posted two questions but didnt get any reply what so ever.Hopefully i wont be ignored now. Q No.1. in percentage composition the percentage of...
retro_rat09
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Feb 5, 2009
7:42 am
13605
Greetings Carbon adsorbs,so if we make fine powder and add it in our diet would it have any harmfull effects? Usefull effect could be that it comes out of your...
shailendra Indulkar
indulkarshailu
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Feb 7, 2009
6:16 pm
13606
If your unknown amino acid were glycine, how many signals would you expect to see in the NMR spectrum?...
chickgirl58977
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Feb 7, 2009
10:27 pm
13607
Glycine zwitterion structure is H3N-CH-COO (without charges). You expect to have 2 peaks. However H atoms bind to N will be downfield, below 10. The spectra...
ludwig_julca_83
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Feb 8, 2009
4:40 pm
13608
Ludwig, that's crap. True, it's most likely that it will be in the zwitterion form. But the solvent is also very important. Glycine as such (and free...
beniamin pintea
bnpintea
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Feb 8, 2009
7:05 pm
13609
All of the repliers to this question are right. Every one gets a prize. The replier who posted a Japanese web site giving the actual spectrum (one peak) was...
Steve
steve_geo1
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Feb 8, 2009
10:18 pm
13610
hi,i dont know why I'm not getting any reply for my questions,is it my i.d or my nick that u Guys dont like.Anyway in continuation of my unanswered questions...
Mian Sahib
retro_rat09
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Feb 9, 2009
2:16 pm
13612
Some of us are so busy ... Anyway, the chlorine radical is very reactive since it will easily pick up an electron from nearby molecules. If the only molecule...
Lance Corey
ld_corey
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Feb 11, 2009
3:09 am
13613
Hi, Carbon powder, as carbon black, absorbs very little odor. Activated charcoal will absorb a lot of odors. Unfortunately, it will also absorb water, which...
Lance Corey
ld_corey
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Feb 11, 2009
3:15 am
13614
Hi, The percent composition of the material is determined since some compounds look very similar to another compound. When the percent composition is found,...
Lance Corey
ld_corey
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Feb 11, 2009
3:23 am
13615
How can i prove that benzene has three double bonds (carbon = carbon)?...
joyanta292
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Feb 11, 2009
4:23 pm
13616
I'm a chemical engineer weak in organic chemistry so maybe there is a better answer. The molecule is too small to see. To prove there are 3 double bonds,...
BRIAN JENSEN
brianedwardj...
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Feb 11, 2009
7:29 pm
13617
I'm surprised to read that activated carbon has more surface than carbon powder. Activated carbon 500 M^2 per gram Carbon powder has 20 nanometer diameter...
BRIAN JENSEN
brianedwardj...
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Feb 11, 2009
8:35 pm
13618
you can make use of some mass spectroscopy, considering what molecules are involved you may have too look out for some mclafferty rearangements ...
Rafael Polo
sadat492003
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Feb 11, 2009
9:46 pm
13619
Please: 1) let me know ehre i can find in the internet exercises and problems reoslve on aplication of vande der waals equation (real gases)-calculation of...
Antonio
galopus
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Feb 11, 2009
11:47 pm
13620
hi can anybody tell me how to find outexact bond energies by any software like chemultra or mopac etc. arslan [Non-text portions of this message have...
dilpakistani
dilpakistani...
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Feb 12, 2009
6:24 am
13621
It was found that 19.60 mL of NaOH solution were required to neutralize 10.00 mL of HCl. if the concentration of the base solution was 0.1051 M, calculate the...
keeshiay
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Feb 12, 2009
2:39 pm
13622
what information can be deduced from sodium fusion procedures?...
keeshiay
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Feb 12, 2009
2:40 pm
13623
Help me calculate the volume of 19.1 M NaOH (50%wt) solution required to prepare 500 mL of 0.1 M NaOH. density of 50% NaOH (wt) solution is about 1.5 g/mL....
keeshiay
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Feb 12, 2009
2:42 pm
13624
Please help me. What weight of potassium acid phthalate (KHP) is required for the neutralization of 45.0 mL of 0.095 M NaOH?...
keeshiay
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Feb 12, 2009
2:43 pm
Messages 13593 - 13624 of 13928   Oldest  |  < Older  |  Newer >  |  Newest
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