Chemistry - January 2007

I am writing a paper about how to prevent epidemic disease from spreading globally. I want to apply the 2nd law of thermodynamics to this but don't understand it well enough to apply it (yet!).Where can I find information about this?
Am I on the right track or way off base?
Websites, books, textbooks...any info will help.

2007-01-13 07:46:54 · 1 answers · asked by natrgrrl 2

calculate the vapor pressure at 50 celsius given deltaH vap. 30.1 KJ/mol

2007-01-13 07:46:41 · 1 answers · asked by mibrasilmania 1

The lines in the emission spectrum of hydrogen can be correlated to transitions of electrons from higher energy levels to lower energy levels because the photons emitted have specific wavelengths.

The statement above is true but why is it true??

2007-01-13 07:43:15 · 3 answers · asked by jsock 1

Does anyone know what it is about diamonds that mean they have a giant structure instead of a simple molecular structure? I'm getting in a total muddle over this lol

2007-01-13 07:05:22 · 9 answers · asked by yummygummybear2006 1

2007-01-13 06:55:02 · 7 answers · asked by Destiny L 1

Looking for sorbitol, tocopherol (vitamin E), glycine/alanine/serine (any one of those three), palmitate (vitamin A), paraffin wax, oat amino acids, lactose, lactic acid, lecithin, anhydrous lanolin, vitamin C, vitamin C ester, coconut oil, and glycerin.
Information on where to find one or some of those is fine. If I can get them all in one place, that's even better.
Information on how to synthesize or derive them myself could also be useful.

2007-01-13 06:42:52 · 5 answers · asked by someday. 2

2007-01-13 06:31:36 · 3 answers · asked by Eileen L 1

Ozone in the upper atmosphere absorbs energy in the 210-230 nm range of the spectrum. In what region of the electromagnetic spectrum does this radiation occur?

infrared
ultraviolet
microwaves
visible region

is it uv

2007-01-13 06:30:16 · 3 answers · asked by Krazyk78 1

all i need to know is how hot a Bunsen burner (running on propane) burns, also if you know any other mechanism i could use to generate a high heat flame (2000 F would be nice) that would be handy

2007-01-13 06:15:36 · 3 answers · asked by Rei Deus 2

2007-01-13 06:14:10 · 11 answers · asked by Anonymous

does anyone know some practical examples of uses of Carboxylic acid?

If possible something teenagers aged 15-18 would know and/or use

2007-01-13 05:44:46 · 6 answers · asked by Jonathan 2

Is it a myth, or is it really possible to make an explosive from the right combination of sugar and salt, with an electric charge? I heard the IRA know how to do this. If it possible does anyone know the right percentage of each compound?

2007-01-13 05:28:49 · 9 answers · asked by Anonymous

2007-01-13 05:16:12 · 8 answers · asked by NUALA W 1

I wanted to know: how do you figure out if a quantum number set is possible? Thanks--I really need this information to help me study for my midterm.

2007-01-13 05:01:41 · 2 answers · asked by Dana Mulder 4

Milam is doing an experiment on fish expansion life. So, he has two tanks: one with salt water and another with regular water. He placed five fish in each tank. He recorded the results within five weeks. Two fish died in salt water while a fish died in the regular water tank. Can someone please help me find the independent variable, the dependent variable, and the control variable?

2007-01-13 04:38:19 · 5 answers · asked by biancaonwenu 2

... the water to drop to 1, what would the pH of battery acid be if the chloride ions (Cl-) were removed from battery acid?

2007-01-13 04:36:22 · 7 answers · asked by Lisa 1

If 40.2g sample of iron was heated to 99.3 oC and then placed in a simple calorimeter containing 120g of water at 21.8oC. If the heat of the reaction is -1.35kJ, what is the heat of the water?

2007-01-13 04:33:14 · 2 answers · asked by Special K 1

I'm only in high school, so please keep the answers fairly simple! I can't find this info anywhere on the internet.... Thanks a lot.

2007-01-13 04:23:31 · 3 answers · asked by Anonymous

29g of Ag combines completely with 4.3g of S to make Ag2S. What is the percent composition of Ag and S in this compound?

i think i found the answer to this problem but i'm really not sure. i got 43.5% of Ag and 12.9% of S.

please help!!! thanks!

2007-01-13 04:15:35 · 4 answers · asked by mbroderickluver 2

2007-01-13 03:50:36 · 2 answers · asked by Anonymous

2007-01-13 03:26:56 · 4 answers · asked by Slim Ar 1

I did a lab and need to write my discussion..can someone help or give me an idea of what to write.
I use a solution label "A"..and test it on universal indicator.(No Change)
-solution "A" on phenolphalein indicator.(No change)
-and solution "A" in reaction with soduim hydrogen carbonate..(No reaction changed)...

so, for these observation..so far .. what do u think I can write....and what are the inference?..Thanks in advance for giving me such big help...

2007-01-13 03:06:05 · 3 answers · asked by Anonymous

2007-01-13 02:51:43 · 5 answers · asked by Anonymous

2007-01-13 02:50:46 · 5 answers · asked by Anonymous

2007-01-13 02:29:19 · 3 answers · asked by Anonymous

this question came up and my proff wouldnt tell me the answer. no matter what bk i look in or internet site i cnt find the answer
please help, its been bugging me for ages

2007-01-13 02:28:39 · 5 answers · asked by [haricot] 2

its a chemistrymaterial..

2007-01-13 02:24:55 · 2 answers · asked by Anonymous

chemistry question

2007-01-13 02:20:34 · 6 answers · asked by martin 1

neutral atoms are different with that of mono-atomic ions.then what is their difference?

2007-01-13 01:25:13 · 4 answers · asked by Ninik 3

Stoichiometry?
i need help with this topic. i'm kinda new to this one. pls show some working as well so that i can learn from there thks.


1) how many moles are there in 8 grams of hydrogen gas?
2)how many moles are there in 8 grams of bromine liquid?
3)how many grams of neon have the same number of atoms as 8 grams of oxygen?

2007-01-13 01:18:56 · 3 answers · asked by Galyose 1