What is evidence of a synthesis reaction?
829565
A synthesis reaction is when you start off with 2 substances and end up with 1:\nA+B--->AB\n\nFor example \n\nanhydrous copper (II) sulfate + water --> copper sulfate pentahydrate\nCuSO4 + 5H2O  ---> CuSO4* 5H2O\n\nIn this reaction, the color changes from white to blue. So the color change is the evidence.
32646
Synthesis\nSynthesis of RNA is usually catalyzed by an enzyme, RNA polymerase, using DNA as a template. Initiation of synthesis begins with the binding of the enzyme to a promoter sequence in the DNA (usually found "upstream" of a gene). The DNA double helix is unwound by the helicase activity of the enzyme. The enzyme then progresses along the template strand in the 3’ -> 5’ direction, synthesizing a complementary RNA molecule with elongation occurring in the 5’ -> 3’ direction. The DNA sequence also dictates where termination of RNA synthesis will occur.
604643
From which perspective?  Reactions or Transport or both?\n\nLike, if you want to do reactions, you can give a rate law for absorption and reaction on a catalyst.  Solve for the PBR size necessary to give X % conversion of the reactants.\n\nFrom a mass transport standpoint, perhaps look at the mass flux of reactant to a catalyst surface?
515773
There are too many challenges in this molecule to come up with a synthesis in a few minutes.....1 chiral centre, 2 quartenary carbon centres next to each other, and geometrically specific double bonds.  However many syntheses have been completed.  The references below will direct you to published syntheses of analogues.  The first two are probably the most useful.\n\nTetrahedron, 1992, 8229-8238\nTetrahedron Letters, 1972, 2521-2524\nTetrahedron Letters, 1999, 6347-6351\nTetrahedron Letters, 1997, 1797-1800\nPhytochemistry, 1996, 23-28\nBioorganic and Medicinal Chemistry Letters, 1995, 275-278\nTetrahedron Letters, 1989, 1741-1744\nTetrahedron Letters, 1988, 5339-5342\n\nyou can access the journals through www.sciencedirect.com, but you may need to pay for them if your institution doesn't have access.\n\nhttp://cbr-rbc.nrc-cnrc.gc.ca/abscisicacid/\n\nAlso try the link above - gives you some more information.\n\nHope this helps.
833808
This is a addition-elimination reaction (http://www.chem.ucalgary.ca/courses/351/Carey/Ch23/ch23-3-3.html). can be accelerated by lewis acids.
610332
carwash's ideas are pretty good, particularly TLC and spectroscopy.\n\nI don't think I'd do a titration against a base, because esters will also react with bases (hydrolysis). For a synthesis, this doesn't matter. But for an analytical method, it invalidates the technique, unless you can account for it with a standard or something. You might end up getting a result higher than what it should be because of it. (It depends on the chemical environment of the ester)
555664
The formula could be (C6H12OH)n, in which case it could be synthesised from the corresponding aldehyde. Expensiveness depends on how much and how pure of a product you want.
204474
http://en.wikipedia.org/wiki/Steroid_hormone#Synthesis\n\nhttp://www.indstate.edu/thcme/mwking/steroid-hormones.html
931996
Compared to the formation of CO2 and H2O, these other products are formed in minute quantities, usually in the part per million level.  \n\n1. Reactions represent what happens under controlled conditions (pure single compound gasoline, pure oxygen).  The burning of gasoline in a car is far from controlled conditions.  The reaction in the car also does not occur to 100% as in the written reaction (formation of CO as a product for example).\n\n2. Another reason is that most of the pollutants form due to impurities in the gasoline.  Again, minor reactants are not shown in the equation since it implies pure starting materials.  These would include sulfur compounds and other organics.  \n\n3. Another reactant not shown for the car reaction is nitrogen.  We normally write "+ O2", but in a car it is "+O2 + N2 + all the other air components".  This is where the nitrogen oxide pollutants arise.\n\nBottom line, unless you are studying them specifically, minor reactants and products are not normally shown.
896144
A mechanism is considered to be proposed, because we can not look at the reaction and follow it in real time.  The reactants are molecules that are too small to see, and the reaction occurs too fast to watch it step by step.  A proposed mechanism accounts for all the observations, such as kinetics, intermediates, catalysts, etc., but can not ever be "proved".
1108194
I would say that it is not.  The probability of naturally-occuring random chemical reactions generating even an amino acid is so improbable that it is considered a statistical impossibility.
900859
If the metal not in the compound is higher on the activity series than the metal in the compound then a reaction will occur and the metals will switch spots. If the metal not in the compound isn't higher on the activity series than the metal in the compound then no reaction will take place. You got to be joking if you think I'm going to be doing 20 problems for you. The only way to learn these is to do them on your own. Just so you know in #6 a reaction will not occur.\n\nHere is an activity series:\nhttp://en.wikipedia.org/wiki/Reactivity_series\n\nREACH doesn't know how to do these, don't listen to his answer.
135532
You can either look it up or determine it experimentally.\nI cant get much more specific without additional details.
737939
Yes. It produces a bright yellow precipate:\nAgNO3 (aq) + KI (aq) → KNO3 (aq) + AgI (ppt)
685217
Well, statistics always govern reactions.  Sometimes the statistics are so much in favor of one product that the others are negligible.  \nRadical reactions (especially on un-functionalized moleculess) are always prone to selectivity problems.  Radicals are so reactive they really don't care what they react with.  The more selective a reactive species is, the more likely a single product outcome is.  It's not "automatic".  Major/minor product mixtures are a reality - you will often ignore them in chem class, but in real life it happens all the time - truly single product reactions are rare.
207847
It's a Chemical/Fusion reaction...
482616
Synthesizing compounds  particularly naturally occuring ones through chemical reactions in the lab or industry.