Chemistry - March 2007

2007-03-25 12:45:31 · 1 answers · asked by Jamie 1

Everyone strives for the hottest flame, but what is the temp of the coldest? When does a reaction become a flame?

2007-03-25 12:27:39 · 1 answers · asked by Michael K 1

After all the dissolved oxygen is used by the fish, where does more dissolved oxygen come from for the fish?

Or do the fish die if you don't mechanically disolve oxygen in the water?

2007-03-25 12:26:42 · 3 answers · asked by Anonymous

what is the increasing order of the following attractive forces: hydrogen bonding, London dispersion forces, ionic bonding, and dipole-dipole forces?

2007-03-25 12:22:57 · 3 answers · asked by Paul W 2

When you boil water, is there less oxygen in the water.

Yes, I am asking that exact statement.

2007-03-25 12:17:03 · 7 answers · asked by Anonymous

So i actually did the lab, but im confused on how i got the answer. First, i kno when they react, Hydrogen gas is produced, and it fizzes. I had magnesium left over and for the amount of grams of the magnesium i had was a negative number and the actual results that my lab teacher had were positive. How is that possible, why, and how come its negative when magnesium was left over?

2007-03-25 12:14:14 · 2 answers · asked by babishbluestar 1

2007-03-25 12:07:52 · 5 answers · asked by Anonymous

Can you chemically add oxygen to water? And if so is it as simple as supplying an oxygentank to water?

I think not because that would not make sense chemically as H2O is a fixed formula.

2007-03-25 11:58:28 · 14 answers · asked by Anonymous

reaction at 425 C is 54.8
H2(g)+ I2(g) ¬ 2HI(g)
if 0.5 mol dm-3 of both H2 (g) and I(g) are allowed to come to equilbrium at 425 C in a closed vessel, what is the concerntration of all three species at equilibrium?

2007-03-25 11:52:19 · 2 answers · asked by asphenry 1

What happens when you chemically remove oxygen from water.

2007-03-25 11:52:17 · 4 answers · asked by Anonymous

and has a molecular formula C7H5N3O6 it is made by recting toluence, C7H8 with nitric acid, HNO3, according to the following equation:
C7H8+3HNO3¬C7H5N3O6+3H2O
1) how many kg of TNT would be produced from the reaction using 1.90g of C7H8?
2) what is the teoretical yeild(in grams) of TNT when 3.80 g of toluence is reacted with 5.80g of nitric acid?
3) if the experimental yield of TNT is 6.25g, what is the percentage yield?


thanks guys and girls

2007-03-25 11:47:43 · 2 answers · asked by asphenry 1

in which one substance transfers electrons to another substance, describe using one example how such a reaction plays an important role in our everyday life.

2007-03-25 11:39:57 · 4 answers · asked by asphenry 1

Some molecules are able to absorb large amounts of energy in the form of internal vibrations and rotations. Materials composed of such molecules have


A) high specific heat capacities.

B) low specific heat capacities.

2007-03-25 11:38:12 · 3 answers · asked by Josh 1

Consider a sample of water at 0°C. If the temperature is slightly increased, the volume of water

A) remains the same.

B) expands.

C) contracts.

2007-03-25 11:32:23 · 3 answers · asked by Josh 1

Do you know anything else about chromotology?

2007-03-25 11:21:35 · 2 answers · asked by spontaneous09 2

What element is produced if you add a pair or protons to the nucleus of mercury

2007-03-25 11:13:58 · 1 answers · asked by Anonymous

2007-03-25 11:13:33 · 6 answers · asked by jenny 5

2007-03-25 11:09:41 · 3 answers · asked by Anonymous

I know the range of a normal sulfide is in the 400-1000 range and is a small peak, often overpowered by other noise in the fingerprint region. I was curious, however, if this sulfide (link below) would show any different type of peak? It is more of a sulfide bridge and wasn't curious how that would show up on a spectra. (it is in an alpha conformation)

Link: http://img252.imageshack.us/img252/6511/sulfidelx7.jpg

2007-03-25 10:55:32 · 1 answers · asked by ScienceNut 2

What kind of expiriments have been done with sulfur?
I know Hydrogen sulfide has is put into stink bombs;
but, I need some sources. Cause I can't just say "hydrogen sulfide is in stink bombs". y'know?

So can anyone give me a site, or at least, RELIABLE information on:
An expiriment with Sulfur
Reliable information
and provide a website/URL?

2007-03-25 10:48:30 · 1 answers · asked by kiki 1

Specifically, where can I find the structural formulas for:
- Calcium Carbonate
- Sodium Carbonate
- Bicarbonate
- Other carbonates

2007-03-25 10:43:37 · 1 answers · asked by Anonymous

I know its on the periodic table but what is it ?

2007-03-25 10:28:50 · 2 answers · asked by lancasterangel03 2

2007-03-25 10:21:16 · 4 answers · asked by z40 1

Calculate the percentage of [ CaCO3 ] in Chalk if it's found that 2gm of [CaCO3] require 300ml of 0.1N HCL for complete solubility and neutralization..

2007-03-25 10:20:37 · 2 answers · asked by M T 1

The empirical formula of styrene is CH; the molar mass of styrene is 104.14 g/mol. How many H atoms are present in a 3.40 g sample of styrene?

Does anyone know how to do this? I really don't know where i should start...

2007-03-25 10:07:29 · 1 answers · asked by nomad 2

The rancid butter odor of butyric (or butryric) acid is much stronger than the goat-like smell of caproic acid. However, a spill of caproic acid on your clothing would linger longer than the smell of butryric acid and a lot longer than the smell of acetic acid vineger. Explain this diffference. (look at physical properties)

2007-03-25 10:03:24 · 1 answers · asked by kelxcore09 1

i need the whole experiment for a chemistry project. thanks

2007-03-25 10:02:44 · 1 answers · asked by Chels 1

I"m doing a project and I can't seem to find anything that will actually tell me why...

2007-03-25 09:58:15 · 2 answers · asked by viv s 1

The rancid butter odor of butyric (or butryric) acid is much stronger than the goat-like smell of caproic acid. However, a spill of caproic acid on your clothing would linger longer than the smell of butryric acid and a lot longer than the smell of acetic acid vineger. Explain this diffference. (look at physical properties)

2007-03-25 09:53:57 · 1 answers · asked by kelxcore09 1

2007-03-25 09:53:31 · 3 answers · asked by partha_joy2001 1