Chemistry - November 2006

any reference would be appreciated

2006-11-28 02:06:41 · 1 answers · asked by Ian C 1

2006-11-28 01:48:50 · 2 answers · asked by llatina2007 1

1. the electron cloulds have a very defined negative charge that causes them to repel one another.

2. The electron coulds are arranged in a manner that maximizes their bond angles and distances.

3. The electron clouds in a trigonal bipyramid are all at right angles to one another in order to maximize their bond angles and distances.

4. Electron clouds in a molecule that has an SN value of 6 are all at right and maximum angles to one another

2006-11-28 01:27:42 · 4 answers · asked by rnjes21 2

Is an 02 molecule a nonplar covalent molecule?

2006-11-28 01:18:48 · 2 answers · asked by rnjes21 2

2006-11-28 00:59:16 · 2 answers · asked by Anonymous

2006-11-28 00:16:33 · 4 answers · asked by Anonymous

2006-11-28 00:00:17 · 1 answers · asked by noga_4ever _ 1

thanks a lot.

2006-11-27 23:27:42 · 2 answers · asked by Anonymous

NO! I DON'T RECCOMEND!
And I don't need to know myself to "pass" anything.
But, I've heard it sooo many times by individuals who do, and I just can't see it working much less being very safe.
What do you think?

2006-11-27 23:23:50 · 8 answers · asked by policetac 3

I need to calculate the volume of hydrogen gas penerated when 3 mL of a 1M sodium borohydride reacts with conc. HCL. and then calculate the volume of hydrogen that can be liberated by reacting 1 g of zinc with acid. and write a balanced equation for the reaction of sodium borohydride with platinum chloride.

2006-11-27 22:41:07 · 3 answers · asked by Ron P 1

I think it has to do with altering molecular weight, but I don't understand how. And I could be completely off in that assumption. Thanks for the help everybody!

2006-11-27 22:12:42 · 1 answers · asked by thesekeys 3

i want to know about mass chromatography and not spectroscopy(it is a new search).can help

2006-11-27 21:30:16 · 0 answers · asked by nefer900 1

2006-11-27 21:13:08 · 4 answers · asked by a s 1

2006-11-27 21:04:05 · 2 answers · asked by a s 1

2006-11-27 21:03:42 · 2 answers · asked by a s 1

1. Liquids generally have lower density compared to their solid state. Then why does ice float on water?

2. Why does an air cooler cool better on a hot, dry day?

Please answer the above keeping in ming that my school follows the 9th standard CBSE portions and that I have a science exam tomorrow.

The answers to these two in the previous question didn't seem too clear.

2006-11-27 20:44:02 · 9 answers · asked by Akilesh - Internet Undertaker 7

Is it possible to burst a bubble underwater?

2006-11-27 20:33:28 · 4 answers · asked by techno mentalist 4

N2O4(g) <-> 2NO2(g)

The forward reaction involves breaking the N-N bond and is endothermic. If the temperature of a system at equilibrium is raised, willl the intensity of the brown color increase, decrease, or remain unchanged?

I think this has something to do with Le Chatelier's Principle, but I still can't determine the answer. Thanks for the help everybody! Oh and please don't answer if you can't answer the question :)

2006-11-27 19:54:42 · 4 answers · asked by thesekeys 3

2006-11-27 19:31:45 · 4 answers · asked by mrk_scholars 1

The standardization of NaOH(aq) using potassium hydrogen phthalate (abbreviated KHP, molar mass 204.22 g/mol,
The titration of acetic acid(aq) with the standardized NaOH(aq).

You will dissolve 0.30 g of KHP in 20 mL of water and titrate with the NaOH. To the nearest mL, calculate the volume of NaOH expected assuming that the NaOH concentration is ~0.1 M.

2006-11-27 19:25:57 · 2 answers · asked by smile 1

Also,in acidic solution contains silverions, what anions are probably absent?

2006-11-27 18:27:48 · 2 answers · asked by Kriztine96 1

Ksp for calcium phosphat is 1 x 10-33. The Ksp for CaF2 is 4 x 10-11. Ka for HF is 7.1 x 10-4. Ka for HPO42- is 1.7 x 10-12. In the elimination test, CaF2 precipitates from acetic acid,not Ca3(PO4)2. Offer an explanation for this behavior.

2006-11-27 18:17:59 · 1 answers · asked by Kriztine96 1

Your help is greatly appreciated!

2006-11-27 18:16:15 · 1 answers · asked by Kriztine96 1

Suppose permanganate was used to test for reducing agents.Would permanganate likely cause more anions to behave as reducing agents or fewer? Explain.

2006-11-27 18:08:25 · 2 answers · asked by Kriztine96 1

If I have 6.0004 g salicylic acid and 8mL acetic anhydride, what is the theoretical yield of Aspirin (in grams)?
I calculated assuming an excess of AA and got 7.8266g Asp.
But is AA the limiting reactant? And if it is, then what is the actual theoretical yield? Oh I also figured the balanced equation to be:
C7H6O3 + C4H6O3 = C9H8O4 + HC2H3O2
sal. acid MW is 138g/mol
aspring MW is 180g/mol
thanks everybody! :D

2006-11-27 17:55:44 · 2 answers · asked by thesekeys 3

Whats the glass thing called which looks like a ball with a pole on the end and its completely hollow. This is a sciency question!

I will give out the best answer to teh first person to give me an answer thats good. QUICKLY NOW!

2006-11-27 17:44:06 · 9 answers · asked by Pandemonium 2

i took a class, but I totally don't understand Chemistry, such as how they react and become different shapes. anyone have good study strategies for learning chemistry easily? please be specific!
p.s. any good website recommand?
Thank you a lot!!!

2006-11-27 17:40:18 · 6 answers · asked by Wenson L 1

besides hot water?

2006-11-27 17:08:43 · 16 answers · asked by blingding 5

2006-11-27 17:06:39 · 4 answers · asked by Srinivasan N 1

2006-11-27 17:03:41 · 5 answers · asked by Srinivasan N 1