Chemistry - May 2007

2007-05-17 05:50:53 · 7 answers · asked by Anonymous

2007-05-17 05:49:38 · 5 answers · asked by chscougar18 1

2007-05-17 05:49:22 · 2 answers · asked by chscougar18 1

Balance:

NO2- (aq) + Cu(s) --> Cu2+(aq) + NO(g) + OH- (aq)

2007-05-17 05:27:32 · 2 answers · asked by Anonymous

Discovery of caffeine-Who, when, and how?
Who determined the molecular strucure? When? How?

2007-05-17 05:21:23 · 3 answers · asked by lov308 2

2007-05-17 05:08:26 · 5 answers · asked by Anonymous

The molecule is a benzene ring with a three carbon alcohol attached to it. The alcohol has the hydroxyl attached to the second carbon in the group of three. It is basically a benzene ring with a three carbon secondary alcohol attached. Please tell me how i would go about naming it.

2007-05-17 05:05:06 · 2 answers · asked by Anonymous

2007-05-17 05:03:54 · 5 answers · asked by Latha V 1

2007-05-17 04:43:08 · 5 answers · asked by Anonymous

1-why is it important to add sufficient amount of water in a flask to cover the delivery tube during the preperation of bromoethane.
2-why isn't it possible to obtain 100% yield of bromoethane during this experiment.
3-what are the safety aspects in this experiment(preperation of bromoethane)

2007-05-17 04:42:48 · 1 answers · asked by dovey 2

1. Lewis
2. Oswald
3. Brosted&lowery
4. Arr Henius

2007-05-17 04:31:57 · 6 answers · asked by Anonymous

2007-05-17 04:31:01 · 10 answers · asked by Anonymous

1. Fe2O3Xh2O
2. Fe3O4XH2O
3. FeO
4. None

2007-05-17 04:30:57 · 6 answers · asked by Anonymous

1. Fehling’s solution
2. Tollen’s regent
3. Behidict solution
4. None of the above

2007-05-17 04:30:13 · 2 answers · asked by Anonymous

1. Ethane
2. methane
3. co2
4. H2

2007-05-17 04:29:11 · 2 answers · asked by Anonymous

2007-05-17 02:31:05 · 2 answers · asked by Anonymous

HCl + Ca(OH)2 + CaCO3 > {answer?}
CuCO3 + Ca(OH)2 > {answer?}
NaCO3 + Mg(NO3)2 > {answer?}
Ba(NO3)2 + Na2CO3 > {answer?}

2007-05-17 02:00:33 · 2 answers · asked by yahooligan! 3

an activation energy of zero and rate constant at 125C of 4.5x10^10dm^3mol^-1s^-1
the radius of a methyl radical is approx 77pm
relative atomic masses of carbon and hydrogen are 12 and 1 respectively. What is value of the probability factor required to reproduce this result using collision theory

2007-05-17 01:08:33 · 2 answers · asked by Anonymous

2007-05-17 01:01:22 · 2 answers · asked by Anonymous

I need to find the process of making nickel granulate.. please help me!

2007-05-17 00:29:45 · 1 answers · asked by Anne C 2

2007-05-17 00:20:25 · 2 answers · asked by RS 1

2007-05-16 22:42:10 · 5 answers · asked by avinash p 1

2007-05-16 21:57:09 · 6 answers · asked by Anonymous

i really appreciate anyone taking the time to help me with this!!

2007-05-16 21:47:46 · 2 answers · asked by Anonymous

2007-05-16 21:46:31 · 2 answers · asked by chandra 1

use method other than hit and trail. please explain in detail.
how to balance an equation in which an element makes two or more compounds.
do you have any idea about 'n' factor balancing. please help

2007-05-16 21:43:56 · 4 answers · asked by mathiphy 2

I already know that i need to use the clock reaction.
Equation 1-H2O2(aq)+2I-(aq) +2H+(aq) ==> 2H2O(l) + I2(aq)
Equation 2-I2(aq) + 2S2O32- (aq) ==> 2I-(aq) +S4O62-(aq)
but i don't know how?

2007-05-16 21:32:08 · 3 answers · asked by ali h 1

What are the opportunity for M.Sc. Analytical person in pharma industry.Weather he can join the R&D lab.What are is the work in R&D lab.

2007-05-16 21:05:17 · 1 answers · asked by geeta s 1

I saw this cleaning guide, which says that a good way to clean silver is to put it in a bucket with baking soda, aluminum foil, and warm water.

http://www.foodnetwork.com/food/ck_cg_cleaning_chart/0,2495,FOOD_19556,00.html

Do any of you chemistry geniuses know what kind of reaction this is? I was thinking it might be electrochemical, but now that I think about it, the baking soda is throwing me off.

BTW I was a biochemistry major in college and took 3 years of chemistry, but this is out of my league.

2007-05-16 19:45:12 · 3 answers · asked by jellybeanchick 7

2007-05-16 19:25:16 · 3 answers · asked by Bri 3