Chemistry - December 2007

2007-12-22 21:21:55 · 3 answers · asked by sacchin b 1

I have ordered list of real numbers. Instead of having integer order number for each element (1, 2,...), I would like to have order numbers that reflect the proximity between two elements. For example, if 4th element's value is 0.5678 and 5th element has value of 0.5682, I want to have order number for 5th element to be something like 4.12 because two numbers are very close.
Are there any methods to do things like this?

2007-12-22 20:57:38 · 2 answers · asked by Anonymous

about 98%ogf the known compounds contain 1 particular element................

2007-12-22 19:31:00 · 10 answers · asked by sgdfdeft 1

will it ionize completely?
are hydroxide ions formed?

2007-12-22 19:15:40 · 2 answers · asked by 52766 1

2007-12-22 17:18:06 · 2 answers · asked by n_udoh 2

In the pH scale hair is in the scale of 3.5 to 5.5.
I think I can use acidic substances to soften my hair.

My cosmetology instructor asked me to find out how hair can be soften using two acidics.

2007-12-22 15:41:49 · 2 answers · asked by Elvy T 1

H2
O2
N2
HCl
CO2
H2S
H30+1
ClNO
NH2-1
SnCl5-1
ClF4+
ICl3
ClF2-1
PCl6-1
PI5
SF6
IF5
C2H6
C2H2
NCl3
NCl5
OF6
XeF4
NO2


-For the diatomic molecules, how does one determine bonding and non-bonding pairs with respect to the central atom as there is no central atom?

2007-12-22 14:50:59 · 2 answers · asked by Anonymous

2007-12-22 13:17:43 · 0 answers · asked by Anonymous

Will it still work the same to make a smoke bomb?

2007-12-22 12:40:27 · 2 answers · asked by Anonymous

2007-12-22 12:30:44 · 4 answers · asked by MTGR 1

4 PH3(g) P4(g) + 6 H2(g)
If, in a certain experiment, over a specific time period, 0.0045 mol PH3 is consumed in a 1.8 L container each second of reaction, what are the rates of production of P4 and H2 in this experiment? The answers are in mol/L.s

2007-12-22 11:54:56 · 1 answers · asked by Ade 1

What was the gas observed bubbling from Zinc, Aluminum, and Magnesium?? Suggest a way this could be tested experimentally.

Write the complete, balanced reaction of the metals with hydrochloric acid. What was oxidized, and what was reduced?

2007-12-22 11:51:47 · 2 answers · asked by I don't know 2

2007-12-22 11:41:45 · 2 answers · asked by abalila a 1

Please give me a scientific answer no answers less then 3 sentences please

2007-12-22 10:57:46 · 4 answers · asked by Fan Of Obama 1

2007-12-22 10:50:02 · 1 answers · asked by jones 1

2007-12-22 10:41:27 · 6 answers · asked by jones 1

It has piss and other chemicals in it. tell me about how salt can freeze or things like that. I want a scientific answer please

2007-12-22 09:56:39 · 17 answers · asked by Fan Of Obama 1

P4O10 + 6H2O → 4H3PO4
a) 1
b) 3
c) 6
d) 9

2007-12-22 08:40:30 · 4 answers · asked by Anonymous

Solid Zinc reacts with aqueous HCL to produce Zinc chloride and Hydrogen gas. In a rcent experiment, 20 grams of Zn reacted to produce H2 at 30 degreed C and at a pressure of 700 mm Hg.

1. Determine the volume of H2 collected at STP.
2. Calculate the pressure of the dry hydrogen gas.
3. calculate the volume of H2 collected at the conditions it was collected.
4. Determine the mass of hydrogen gas collected.
5. calculate the experimental density of H2 from the lab data.
6. calculate the accepted value for density of hydrogen gas
7. calculate the percent error.

PLEASE SHOW WORK!!!! thank you and for answers... best answer + 5 stars!!!! thanks again!

2007-12-22 08:09:15 · 2 answers · asked by papi 5

I have few questions on these...are they sublimation, condensation, solation, fusion, or freezing? (answer choices can be used more than once) 1. if a temp increases from 10 C to 60 C at a constant pressure of .4 atm...
2. if the temp decreases from 110 to 40 C at a constant pressure of 1.1 atm...
3.if the pressure increases from .5 to 1.5 atm at a constant temp. of 50 C.

I also don't know if my answer is correct for this:
1. samples of F2 gas and Xe gas are mixed in a fixed vol. container. the initial pressure of the F2 gas is 8 atm and the Xe is 1.7 atm... when all the Xe gas reacted forming a solid compound, the pressure of the unreacted F2 was 4.6 atm. the temp remained constant. what is the formula?

my answer I got was XeF4....is that correct?

2007-12-22 07:59:09 · 1 answers · asked by Anonymous

Help!!!

2007-12-22 03:05:01 · 1 answers · asked by Anonymous

2007-12-22 01:36:29 · 1 answers · asked by vaibhav m 3

this is chemical reaction at 800C ,acually the powder was mixture between Pr2CuO4 +CuO reaction with CS2 gas.

2007-12-21 23:03:24 · 1 answers · asked by meso 1

1. Is it possible to have an equilibrium with AgCl dissolved in water where there is more Ag ions then there are Cl ions ?

2. in the equilibrium, the Ag and Cl are forming solids at the same rate as they are dissociating into their ions

if statement 2 is correct and in statement 1 it is possible,
then how does it work? coz then when Ag and Cl form solid, there would be some Ag left over since only one Ag goes with each Cl

2007-12-21 21:36:52 · 3 answers · asked by Anonymous

Is it possible to achieve Absolute zero kelvin?At this temperature what will be the state of matter?Give some examples for real and ideal gases.

2007-12-21 19:33:56 · 6 answers · asked by Anonymous

I would like to know if Uthium is the same as lithium? I did some research, but I'm still confused! Thanks.

2007-12-21 18:35:22 · 5 answers · asked by ilovestirfry 2

when u dissovle solid AgCl in water

the Ag and Cl ions seperate

say the solution is at equilibrium

if u just add more Ag ions then the dissolving of AgCl should be suppressed (thus lowering the solubility of AgCl) due to the common-ion effect so that the concentration of Ag ions can be reduced right?

but then wont suppressing the dissolving of AgCl also lower the Cl ion concentration ? since each Ag ion would be bonded to a Cl ion in the solid form?

if im right, then how do u really get back to equilibrium state?

if im wrong, correct me and explain please?

2007-12-21 18:07:28 · 1 answers · asked by Anonymous

can some one explain this effect to me in SIMPLE terms ?

and explain why it happens?

2007-12-21 17:42:01 · 3 answers · asked by Anonymous

Thanks.

2007-12-21 13:33:19 · 5 answers · asked by chacha 2

1. do all solutes dissolve to the same extent in the same solvent? how do you know

2007-12-21 12:48:03 · 4 answers · asked by xoxo§kailey§ 3