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  DETERMINATION OF CaO IN LIMESTONE. What's the importance of these procedures?

  Posted by mschristinad on Nov 28, 2009 at 08:51 AM

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  Do you know how to make in home environment a glass-clear liquid polyester or polyurethane resin?

  Posted by dsuser on Nov 26, 2009 at 03:23 PM

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  Mercury in a thermometer is a liquid. What property of a liquid does a thermometer use?

  Posted by lucky092569 on Nov 26, 2009 at 07:02 AM

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  Will table salt bond with ethane and why or why not?

  Posted by catlover on Nov 24, 2009 at 06:27 PM

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  What is pH?

  Posted by animallover on Nov 24, 2009 at 06:01 PM

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  What is pH?

  Posted by sworge on Nov 23, 2009 at 04:48 AM

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  What are some ways to remember the following terms?

  Posted by dogcrazy on Nov 22, 2009 at 07:56 AM

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  Which of the following monomers could be used to make a condensation polymer?

  Posted by booboo0 on Nov 18, 2009 at 06:29 PM

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  What structural feature usually needs to be present in order for an addition polymer to be produced?  

  Posted by teatime10 on Nov 18, 2009 at 06:23 PM

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  What is the essential feature that a molecule must have in order to it be involved in the formation of a condensation polymer? 

  Posted by summer10 on Nov 18, 2009 at 06:20 PM

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    Polyethylene (polyethene) has which of the following monomers?   CH2   C2H4   CH4   C2H6

  Posted by kungfufu on Nov 18, 2009 at 06:17 PM

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  In another sample of polyethlene, the molecules contain on average, 450 monomer units. What is the molar mass of the polymer?

  Posted by feder12 on Nov 18, 2009 at 06:12 PM

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  A sample of polyethene has an average molar mass of 84500 g mol-1.

  Posted by nadal2sc on Nov 18, 2009 at 06:09 PM

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  You will have also read that the carbohydrate polymers starch and cellulose are composed of glucose molecules.

  Posted by lee100 on Nov 18, 2009 at 05:44 PM

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  Why does water expand when cooled, unlike other substances which contract when cooled?

  Posted by ustaad on Nov 17, 2009 at 05:58 AM

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  Why do some substances react with each other, while others don't?

  Posted by jescka on Nov 14, 2009 at 08:27 PM

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  What are the properties of nylon?

  Posted by sandali on Nov 4, 2009 at 06:48 AM

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  Why should enough solid KHT be added to the KCl-NaCl solution to ensure that some solid remains undissolved after the 20-min stirring?  

  Posted by mook12 on Nov 3, 2009 at 03:21 PM

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  What are free radicals?

  Posted by manghovo on Nov 1, 2009 at 12:15 PM

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  According to the Bohr model of the hydrogen atom, how is hydrogen's bright line spectrum produced?

  Posted by mks693 on Oct 27, 2009 at 04:38 PM

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  How are vaporization and condensation related?

  Posted by cadkison on Oct 26, 2009 at 08:09 PM

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  How do you write the chemical equation using NaOH and H2O? Include heat on the appropriate side of the equation?

  Posted by dandelion125 on Oct 24, 2009 at 10:49 PM

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  How does methylmercury affect the human body and how did it end up in the food chain?

  Posted by animallover on Oct 12, 2009 at 12:34 PM

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  Which are necessary substances  to obtain glycerine and describe the process of obtaining it.

  Posted by flowerelia on Oct 12, 2009 at 07:25 AM

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  i want to make a gas sensor for co2 based on electrochemistry. So i want to know that how can we genrate potential difference with co2?

  Posted by deveshk on Oct 7, 2009 at 06:42 AM

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  hat gases would be compound? homogeneous mixtures? heterogeneous mixtures?

  Posted by lovehockey09 on Oct 6, 2009 at 05:15 PM

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  How would I write a chemical formula?

  Posted by pranay99 on Jul 11, 2009 at 10:36 PM

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  How could I separate a mixture of salt and sugar?

  Posted by police on Jun 13, 2009 at 05:04 PM

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  How do you find mass with only being given STP and the ending compound

  Posted by ksaunders92 on Jun 9, 2009 at 10:29 AM

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  How Natural gas is used in different industries like Steel,Paper,Power generation,Medicines & Explosives, Plastics etc.?

  Posted by ashwinheda on Jun 8, 2009 at 03:24 AM

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  Ammonium salts decompose on heating. What other property do ammonium salts have in common?

  Posted by archishrma on Jun 5, 2009 at 03:18 AM

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  Give a chemical test to distinguish between the following- 1. ferric salt and ferrous salt 2. sodium sulphate and ammonium sulphate.

  Posted by ramesh-chandra-sharma on Jun 5, 2009 at 03:09 AM

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  Name- 1. black metallic oxide which reacts with hydrochloric acid to give a colored solution 2. the gas produced when Cl water is exposed to sunlight

  Posted by riticool on Jun 5, 2009 at 03:03 AM

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  Explain why anhydrous HCl is a poor conductor of while aqueous HCl is an excellent conductor?

  Posted by itssnigdha on Jun 5, 2009 at 02:48 AM

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  List the physical properties of nitrous oxide.

  Posted by misstwin2 on May 27, 2009 at 05:42 AM

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  What is the ratio of the average kinetic energies of hydrogen and helium at the same temperature?

  Posted by chemgirl92 on May 19, 2009 at 07:57 PM

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  What is the structure of gelatin (explain how it is bonded together, the type of bonds, etc.)?

  Posted by jiggle-boi on May 12, 2009 at 03:46 AM

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  What is the total number of atoms represented by the formula 2CO2?

  Posted by april1961 on May 8, 2009 at 01:20 PM

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  What happens to temperature when an exothermic reaction takes place? What happens to temperature when an endothermic reaction takes place?        

  Posted by arif4ever on May 7, 2009 at 12:59 PM

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  Identify the major species present in an aqueous solution of each of each of the following substances: (a)HClO; (b)CaBr2; (c)KClO; (d)HNO3; (e)HCN

  Posted by nutshell on Apr 28, 2009 at 11:13 AM

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  How are pressure, volume and temperature related to the behavior of gases?

  Posted by hyun980106 on Apr 27, 2009 at 07:01 PM

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  how is shampoo made chemically?

  Posted by arunndhati on Apr 24, 2009 at 11:07 PM

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  Explain the process of crystallization from fusion, from vapour, from solution.                                              

  Posted by ammar658 on Apr 24, 2009 at 10:35 PM

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  What molecular compound is formed by Phosphorus and Fluorine?

  Posted by Hailey93 on Mar 25, 2009 at 03:56 PM

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  what is difference between shielding & deshielding proton in NMR.

  Posted by shailendrdubey on Mar 24, 2009 at 06:06 AM

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  Combustion Analysis, please help me ):

  Posted by swajywa on Mar 16, 2009 at 06:35 AM

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  chemists have determined the equilibrium contstants for several reactions. in which of these reactions are the products favoured over the reactants?

  Posted by saghar on Feb 26, 2009 at 04:40 PM

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  Bromine chloride, BrCl, decomposes to form bromine and chlorine? 2BrCl(g)__________ Cl2(g)+Br2(g)

  Posted by layn on Feb 26, 2009 at 04:07 PM

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  Green olives are preserved in 30% sodium chloride to avoid contamination by microoganisms. why are they preserved in the way?

  Posted by peachy12 on Feb 26, 2009 at 11:18 AM

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  About vinyl chloride: reaction, obtaining, properties

  Posted by zuzuman on Feb 26, 2009 at 05:28 AM