Chemistry - May 2007

can you help me on this acidic equation?

S406 (2-) +Al -------> H2s + Al (3+)


and



MnO4(-) + C2O4 (2-) -----> Mn (2+) + CO2

2007-05-24 17:39:43 · 2 answers · asked by Anonymous

so we're using a GCMS with an electron capture detector. Some solutions we are running are lighter fluid, isopropyl alcohol and paint thinner. We aren't getting good results. Could this be due to the type of detector the machine uses? Can you explain this? Thanks

2007-05-24 16:36:12 · 1 answers · asked by Anonymous

Tuning solution is 100 ppb Li, Y, Ce, Co, Tl

2007-05-24 16:21:43 · 1 answers · asked by charlie 1

2007-05-24 16:08:22 · 3 answers · asked by Karina 1

2007-05-24 16:07:05 · 12 answers · asked by LoCo#33 1

The density of silver is 10.5g / cc. 28.35 grams are in an ounce.

How do you do this problem? Thanks!

2007-05-24 16:04:45 · 3 answers · asked by christopher239938 1

Cold water or warm water?
And what about hydrocodone?

2007-05-24 16:02:44 · 1 answers · asked by Anonymous

a-enough energy only.
b-favorable orientation only.
c-enough energy and a favorable orientation.
d-a reation mechanism

2-how does the potential energy of the activated complex compare with the potential energies of the reactants and products?

3-if a collision between molecules is very gentle, the molecules are
a-more likely to be orientated favorabley.
b-less likely to be orientatted favorably.
c-likely to react.
d-likely to rebound without reacting.

4-a species that changes the rate of a reaction but is neither consumed nor changed is
a-a catalyst
b-an activated complex
c-an intermediate
d-an enzyme

2007-05-24 15:26:33 · 2 answers · asked by serene 1

Four flask each contain 100mL of aq solutions of equal concentrations at 35C and 1 atm. KCI, CH3OH, Ba(OH)2, CH3COOH.

1. What soltuions are electrolytes?
2. Most acidic + basic?
3. First flask contains 74g of KCl. Calculate Molarity.
4. Second flask contains 30mL of CH3OH. Calculate percent volume/volume.
5. Calculate the grams of Ba(OH)2 in the third flask.
6. Which solution is most likely to react with an acid to form a salt and water?
7. Ba(OH2), CH3COOH, KCl- color of litmus paper? taste? color with Phenolphtalein?


thanks

2007-05-24 15:20:26 · 2 answers · asked by byt3421 2

matter into energy?

2007-05-24 15:19:38 · 3 answers · asked by Batman 3

Butane gas burns in air releasing 3000kJ.

1. Write balanced chemical equation + physical state.

2. What type of reaction?

3. If 116g of butane are completely burned, what is the total mass of the products produced? + How much heat (in kJ) are produced?

4. If butane is not completely burned, name and write the new compound produced.


THANKS!

2007-05-24 15:15:34 · 2 answers · asked by byt3421 2

2007-05-24 15:09:05 · 3 answers · asked by Batman 3

HTcO4 + NaOH --------> NaTcO4 + H2O (l)
if u begin with 4.5 mg of Tc metal, how much NaTcO4 can be madE? what mass of NaOH ( in grams ) is required to convertt all of the HTcO4 into NaTCO4???

2007-05-24 15:05:16 · 2 answers · asked by Anonymous

2007-05-24 14:57:45 · 1 answers · asked by aku sedey 1

a- OH- (aq)
b- NaHCO3 (s)
c- H2SO4 (aq)
d- Na3PO4 (s)

2007-05-24 14:56:58 · 2 answers · asked by serene 1

Is 2-methyl-2-propanol the same as 2-methylpropan-2-ol?

Why in the second case is 2 in between "propan" and "ol"?

2007-05-24 14:55:05 · 3 answers · asked by James 1

so we're using a GCMS with an electron capture detector. Some solutions we are running are lighter fluid, isopropyl alcohol and paint thinner. We aren't getting good results. Could this be due to the type of detector the machine uses? Can you explain this? Thanks

2007-05-24 14:25:53 · 1 answers · asked by Anonymous

I am doing a unit on substances in my grade 7 class.

1. Are these solutions or mechanical mixtures ?: wood, orange juice, tap water, a loonie coin.

2. What would an example be of a solid in a solid?

If anyone can help me, it would be greatly appreciated.

2007-05-24 14:11:45 · 7 answers · asked by Miss Klezmer 4

i understand that a humidity level increase results in a decrease in air pressure, but does this hold true on the sealed interior of a home? doesn't the nitrogen remain "contained" in a home and not move to the outer fronts of the storm, resulting in an increase in air pressure?

2007-05-24 13:16:10 · 1 answers · asked by taulmachof 1

The diameter of a rubidium atom is 4.95 amu. Considering two different arrangements of atoms, the first being where the atoms are lined up side by side, and the second being where the atoms sit in the "depressions" made by the two atoms beneath it....
a) how many Rb atoms could be placed on a square surface that is 1.0 cm on a side?
b)How many Rb atoms could be places on a square surface that is 1.0 cm on a side, using the second arrangement of atoms (sitting in "depressions")?
c)By what factor has the number of atoms on the surface increased in going to arramgement 2 from arrangement 1?

2007-05-24 12:59:27 · 1 answers · asked by Anonymous

2007-05-24 12:26:43 · 1 answers · asked by Daniella 1

2007-05-24 11:29:40 · 4 answers · asked by 41 1

I am doing a chem project on citric acid and I need to know how it helps or affects the body.

2007-05-24 11:24:37 · 9 answers · asked by joeatkins123 1

what is the difference and could you give me an example?

2007-05-24 11:09:52 · 6 answers · asked by Emo Chick 1

pka1=2.58 pka2=9.24

2007-05-24 11:08:50 · 1 answers · asked by oryan g 1

2007-05-24 11:00:34 · 9 answers · asked by Anonymous

What is the Melting Point of Plastic? I am doing a science experimient and I need to know beforehand what it is, if anyone knows then please tell me. Thanks. I GREATLY appreciate it.

2007-05-24 10:14:11 · 5 answers · asked by Anonymous

A) releases H+ in a solution
B) donates hydrogen atoms
C) accepts protons
D) donates protons

(yikes! it's either A or B... I think.)

2007-05-24 10:01:36 · 9 answers · asked by ? 1

2007-05-24 09:58:55 · 3 answers · asked by nick v 1

A) A weak acid and a weak base
B) A weak acid and a strong base
C) A strong acid and a weak base
D) A strong acid and a strong base

I don't get it!!! Help!

2007-05-24 09:58:41 · 2 answers · asked by ? 1