Chemistry - March 2007

omg

2007-03-04 11:44:22 · 6 answers · asked by Anonymous

suggest at least 3 reasons^_^.or post the links^^
thankyou

2007-03-04 11:41:32 · 1 answers · asked by for2000 3

everytime i touch the handle of a metal door i get a quick shock even if there are some wires around.

2007-03-04 11:40:27 · 3 answers · asked by arlenerahming 1

2007-03-04 11:36:16 · 1 answers · asked by wildncrazypsycho 2

is doesn't matter what period of time he was in but he has to be well known

2007-03-04 11:30:08 · 5 answers · asked by clair 2

2007-03-04 10:56:11 · 3 answers · asked by smitty♥ 2

when you buy gold jewellery in carat.what is the greater in value and the greater in gold,eg 10k 12k 14 k solid gold or 9k 18k and 24k does not say solid gold i was under the impression that the 9k 18k and 24 k had more metal additives than just solid gold.please advise me on this matter

2007-03-04 10:46:23 · 5 answers · asked by fatdadslim 6

I am doing an assignment and I need to know the colours of these aqeous solutions:

Fe 3+
OH -
FeCl4 -
Co(H2O)4Cl2
CrO4 2-
Cr2O7 2-
Cu 2+
Cu(NH3)4 2+

I've tried looking through my textbooks, but I can't find them... please help!

2007-03-04 10:40:18 · 1 answers · asked by winterdarkrain 1

2007-03-04 10:39:52 · 1 answers · asked by chang 1

This is a Biochemistry question.

2007-03-04 10:35:57 · 1 answers · asked by pinkpearls 1

This is for a chem lab, and I'm stuck!!
But, I actually have more questions..
If water and chloroform mixed, and they formed two layers, which one would be mainly water and which is mainly chloroform?
thanks!

2007-03-04 10:30:24 · 2 answers · asked by Anonymous

We're doing an experiment that measures how quickly antacids are neutralized when using Hydrochloric Acid, several antacids, and methyl orange as an indicator as to how fast the solution is neutralized (when it turns orange it is neutralized). Unfortunately we don't have methyl orange; we do however how litmus paper. Can we get some answers as to how we can use the litmus paper instead of the methyl orange? Is neutralized with methyl orange the same thing as a 7 with litmus paper (assuming the solution has become neutral)?

2007-03-04 10:27:24 · 1 answers · asked by Waterfall 3

Its used in an experiment about adsorptionmof oxalic acid using acitivated charcoal and its really important!

2007-03-04 10:13:35 · 2 answers · asked by Anonymous

As a class, alcohols have a functional group called a hydroxyl group. How does this property explain the face that ethanol, dissolves in water but ethane does not???

2007-03-04 10:12:28 · 5 answers · asked by Mani & Nima A 1

5.Using the equation you have just derived in four above, calculate the pH of a solution composed of 155 mL of 0.1 M acetic acid and 45 g of sodium acetate. The pKa of acetic acid is 4.76.
First find the moles of sodium acetate:
45g x 1mol/60g = .75mol
Then divide that by the total amount of solution to find the concentration:
.75mol/.155L = 4.84 M
Then plug the concentrations and the pKa into the equation:
pH = 4.76 + log ([4.84]/[0.1])

pH= 6.44

6.What would the pH of this above solution, from five, be after 0.01 mole of HCl was added?


I have no idea how to do this, I don't even know if I got 5 right. I tried.

2007-03-04 10:11:22 · 1 answers · asked by Anonymous

For the following bonds, which direction is the bond dipole and which end of the bond is positive and negative?

1.) P-O

2.) P-H

2007-03-04 10:07:53 · 3 answers · asked by babishbluestar 1

2007-03-04 10:04:15 · 2 answers · asked by Anonymous

I am studying how to figure out how many moles are in a certain mass of a substance and how many grams in a certain amount of moles. Could you post some practice problems that I could work on?

2007-03-04 09:43:35 · 4 answers · asked by perriermb 1

"One special class of compounds has the The H^+ ion serving in place of a metal ion in the compound which has acidic properties. eg HFwhich is known as hydrogen fluoride or hydrofloric acid".

I am new to chem but understood that ionic bonds are generally formed between metals and non metals.

2007-03-04 09:42:24 · 4 answers · asked by Gideon 1

the energy transfered between objecgts that are at different temp is ?. the temp of a sample does not depend on the amount of the sample a[n] ? property in contrast heat is a[n] ? property

2007-03-04 09:39:01 · 1 answers · asked by bballgirljv 1

Consider all reasonable resonance structures for each compound or ion.

a) ClCCH


b) CO32-


c) C2H4O


d) BrF3


e) C2H6O




you must enter all correct answers in one alphabetical lower case group, e.g., if a) b) and e) are true you would enter abe

2007-03-04 09:38:59 · 1 answers · asked by dannyg11us 1

In the two diatomic molecules, which end of the molecule is positive relative to the other end?

1.) Chlorine Monoflouride, ClF

2.) Iodine Monochloride, ICl

and what if both are negative? how do you answer the question? =/

2007-03-04 09:31:51 · 2 answers · asked by babishbluestar 1

Would you tell me how to solve this problem. I think I must be missing something, the answer I am geting has to be wrong.
Thanks

2007-03-04 09:17:56 · 2 answers · asked by Heavy Metal 3

I have to do a project in chemistry and i have to make a mole (the animal) out of fabric, and decorate him according to the name that i named it. Its name has to be a name with the word "mole" inside of it. so it has to be easy enough to work with. thanks.

2007-03-04 09:17:49 · 8 answers · asked by blazer_baby_2009 1

I can't figure this out. Any help would be appreciated.

2007-03-04 09:04:16 · 2 answers · asked by vikingdude 2

A level question:
What are the products formed when sodium hydrogen sulphate reacts with a base..

Thanx

2007-03-04 08:47:56 · 2 answers · asked by confused! 1

1. When reacting with an atom of fluorine, an atom of sodium will lose an electron and become a sodium________

2. The oxidation # of tin in SnO is ________

3. An ionic compound composed of a covalent compound is a _______

2007-03-04 08:47:54 · 5 answers · asked by Sam A 1

in the Haber process for the production of ammonia, N2 + 3H2 ---> 2NH3. What is the relationship between the rate of production of ammonia and the rate of consumption of hydrogen?
thanks

2007-03-04 08:43:44 · 2 answers · asked by sandcastlesinair 1

Is there a specific term to define this mixture?

2007-03-04 08:36:57 · 6 answers · asked by christy w 1

All the numbers are supposed to be in subscript. So it's CH [lil 3](CH [lil2] ) [lil12] CH [lil3]. Pretend there are no spaces.

In CH3(CH212CH3 there are 3 elements and 44 atoms... Why?

2007-03-04 08:33:51 · 2 answers · asked by whosit? 2