Chemistry - September 2006

2006-09-13 10:47:30 · 25 answers · asked by Grinner5000 4

How much heat energy is given out when 300ml of 0.1 M NaOH solution is reacted with sufficient HCl solution.

NaOH(aq) + HCl(aq) <-> NaCl(aq) + H2O(aq) ?H= -56.2kJ/mol NaOH


And assuming that the volume of the solution after reaction is 600 mL, with mass 600g and the initial temperature of the solution was 25°C. Also assuming that the heat capacity of the solution is the same as of water -= 4.184 J/g/K. What is the final temperature of the solution after the reaction.

2006-09-13 10:45:59 · 1 answers · asked by RED MIST! 5

What is the R group in the Amino acid Cysteine?

2006-09-13 10:35:08 · 5 answers · asked by RED MIST! 5

2006-09-13 10:27:43 · 6 answers · asked by nassafellow 2

2006-09-13 10:22:40 · 3 answers · asked by BeC 4

2006-09-13 10:22:12 · 4 answers · asked by Anonymous

2006-09-13 10:12:29 · 10 answers · asked by Kelsey A 1

I know that there is a chemical reaction and that fire leaves a substance on magnesium when its done burning. Is that substance oxygen? or soemthing else. Only answer if you really know it, this is for a lab experiment at school. thank you.

2006-09-13 10:06:04 · 7 answers · asked by beery 1

i have the reaction of 18.0g of silicon: 3Si + 2N2 Si3N4.

how many moles of silicon react?
how many moles of nitrogen molecules must react?

and what is product form? i dont know what it means.

2006-09-13 10:04:41 · 1 answers · asked by No Know 4

2006-09-13 10:02:29 · 8 answers · asked by J J 1

2006-09-13 09:55:57 · 20 answers · asked by Ross 1

What kind of procedure can be used to simply determie the salinity of the seawater in lab?dehydration, crystalization,etc.,

2006-09-13 08:27:46 · 6 answers · asked by curiousgeorge 1

...really, i'm looking for somthing alittle clearer than somthing made isomeric. thanx

2006-09-13 07:30:38 · 5 answers · asked by countrthght 1

2006-09-13 07:13:11 · 4 answers · asked by faraz_d89 2

Apart from the facts that metals always loose electrons and are good electric conductors and that non-metals always gain electrons and are bad conductors, what is the difference between the two?

2006-09-13 07:12:41 · 5 answers · asked by Anonymous

Is there a table with all noble gas electron configurations?

2006-09-13 06:51:22 · 3 answers · asked by geniusflightnurse 4

im scared because i just bust a thermometer that had mercury in it so i closed that do can someone tell me what will happed

2006-09-13 06:28:19 · 20 answers · asked by catherine m 1

Please tell me if these are true or false. Only tell me if you are definatly sure. Ta!!!
1.Catalysts are specific to certain reactions.
2.Reations slow if catalysts are used.
3.Enzymes increase the activation energy.
4.Reactions slow down if diluted.
5.Inreasing concentration increases the rate of reaction.
6.Pressure increases the rates of gaseous reactions.

2006-09-13 05:39:55 · 33 answers · asked by PeachyPies 3

2006-09-13 05:39:26 · 5 answers · asked by Mz. LoLO 1

2006-09-13 04:40:04 · 8 answers · asked by Anonymous

how hot is the blue flame in a bunsen burner

2006-09-13 03:53:47 · 10 answers · asked by Anonymous

2006-09-13 02:59:02 · 9 answers · asked by venkitachalams 1

What is the current status/progress achieved in research in compression/storage of hydrogen, (fuel cell technology )for use in hydrogen powered cars ? How many more years will it take for hydrogen powered cars to flood the world markets to make the fossil fuels to go in the world museums ? Hydrogen thru electrolyser produces electricity to drive cars, releasing oxygen in the atmosphere. There is no carbon di oxide emission as in the present fossil fuels used in automobiles. Let more cooperative research (on the basis of YOGA Model - UPAYOGA, UDYOGA, VINIYOGA AND SAHAYOGA IN HYDROGEN RESEARCH FOR use in automobiles/production of electricity) be undertaken simultaneously by public / private research institutions all over the world, to save the future generations free from greenhouse emissions and its attendant negative impact on the atmosphere.

2006-09-13 02:42:14 · 4 answers · asked by R Ramakrishnan 1

Ok, the abbreviations by each element in a chemical equations ... are those it's states?

Just some random thing I'm going to make up

OH(g) ... does this mean the state it is in is gas?

2006-09-13 02:36:35 · 3 answers · asked by dbzthrust1929 1

Assumptions: room temperature, nothing goofy (a vacuum or something) and that the entire cup of salt would dissolve. So, I guess my question is: do the salt molecules fit, on a molecular level, entirely between the water molecules and, thus, not increase the volume of the resulting solution?

Thanks! :)

2006-09-13 01:56:41 · 2 answers · asked by DancesWithHorses 3

2006-09-13 01:43:56 · 2 answers · asked by xikay 2

As you know anti-fouling paints applied on ship's outer shell plating to prevent piling up of marine vegrtable or animals on ship's outer shell plating.
Previously we were using paints contained marine biocides of "tributilane" base (TBT anti-fouling paints), which is banned for marine environment protection purpose.

2006-09-13 00:56:05 · 2 answers · asked by behzad s 1

2006-09-13 00:48:41 · 5 answers · asked by savageau2004 1

The question relates to a chemical product with the description "Aqueous dispersion of a hydrophylic copolymer"

2006-09-13 00:37:55 · 3 answers · asked by sjb6501 1

2006-09-12 23:55:04 · 5 answers · asked by mike j 1