Chemistry - November 2006

Anyone know how to determine the fragment size in base pairs? Then determine the percentage error with the experiment? I'm stuck.

2006-11-29 13:50:51 · 1 answers · asked by Love 2

2006-11-29 13:46:18 · 3 answers · asked by Anonymous

The 2px and 2py orbitals in an H atom are degenerate.

This is referring to Hund's Rule...already been to wiki and all that...i need to know if this is true or false and why...i'm lost!

2006-11-29 13:30:42 · 2 answers · asked by Person 3

i'm doing a chemistry lab but due to some circumstances I couldn't get the data.

2006-11-29 13:19:53 · 8 answers · asked by dobby927 2

Ka of Acetic acid is 1.82 x 10^-5 for buffers if it applies here (which I dont know as there is a strong base and not a conjugate base)

2006-11-29 13:19:43 · 1 answers · asked by Aeacus 2

if they are acids, are they weak or strong.

Ba(OH)2
KOH
H2S
Al(NO3)3
CaCl2
Na2SO4
Mg(OH)2
H2CO3
NH4OH
NH4Cl
HBr
FeBr3

2006-11-29 13:13:52 · 1 answers · asked by Anonymous

2006-11-29 13:10:07 · 3 answers · asked by Anonymous

2006-11-29 12:56:41 · 3 answers · asked by ibid 3

The metal or the nonmetal?

2006-11-29 12:43:49 · 2 answers · asked by dylanklassen 2

CH4g + O2g ---- CO2g + H20g

How mwany grams of water formed during the combustion of 0.264 moles CH4?

2006-11-29 12:35:43 · 6 answers · asked by freemanjr2 1

(Some may already be a lil balanced, but not for sure if theyre correct)
28.A) Pb (No3)2 (aq) + H2SO4 (aq) ~~> PbSO4 (s) + 2HNO3
B) Pb (C2H3O2)2 (aq) + 2HCL (aq)~~> PbCl2 (s) + 2HC2H3O2
C) Na3 PO4 (aq) + FeCl3 (aq) ~~> 3NaCl (aq) + FcPO4 (s)
D) (NH4)2 S (aq) + Co (NO3)2 (aq) ~~> CoS (s) + 2NH4 No3 (aq)
THE REST FIGURE OUT & BALANCE :
29.A) HCl (aq) + AgNO3 (aq)~~> _______
B) Pb (C2H3o2)2 (aq) + LiCl (aq) ~~> ______
C) Na3 PO4 (aq) + CrCl3 (Aq) ~~>_______
31. A) H2 SO4 + BaCl2~~~>________
B) Al2 (SO4)3 + NH4 OH~~>______
C) AgNO3 + H2S~~> _____
D) CaCl2 + PB (NO3)2~~>______
E) Ca (NO3)2 + Na2 CO3 ~~> _______

Please help me, i will give a best answer with 5 stars if somebody actually does a good Job

2006-11-29 12:33:15 · 2 answers · asked by truckin_90 2

does anyone know of a good printable periodic table. that would include the elements name and symbol-or that's all that's really wanted on it. nothing fancy.

2006-11-29 12:29:21 · 1 answers · asked by BlaireOboe 1

2006-11-29 12:27:16 · 2 answers · asked by soccerbart24 2

K2S+CuSO4
NH4OH+H2C2O4
KOH+NH4Cl
NaC2H3O2+HCL
Na2CrO4+Pb(C2H3O2)2
(NH4)2SO4+NaCl
BiCl3+NaOH
KC2H3O2+CoSO4
Na2Co3+HNO3
ZnBr2+K3PO4

2006-11-29 12:25:31 · 1 answers · asked by Anonymous

2006-11-29 12:13:10 · 4 answers · asked by Anonymous

What's the difference? Or are they exactly the same with just different names? Please no dumb answers. Thankyou.

2006-11-29 11:58:15 · 1 answers · asked by Anonymous

i found info from these sites. melting point, freezing point, boiling point.
http://chemistry.about.com/library/blar.htm
>>Argon has a freezing point of -189.2°C, boiling point of -185.7°C
http://education.jlab.org/itselemental/ele018.html
>>Melting Point: 83.80 K (-189.35°C or -308.83°F)


Boiling Point: 87.30 K (-185.85°C or -302.53°F)

2006-11-29 11:46:12 · 2 answers · asked by »»Curious¹«« 3

2006-11-29 11:37:22 · 5 answers · asked by sbvb132 1

This is an Organic Chemistry Question. Please help! Also tell me what qualifies you to answer this question!

2006-11-29 11:33:22 · 1 answers · asked by i_luv_vball21 2

Where can I get ammonium nitrate for school and is a licence or ID required to buy it?

2006-11-29 11:14:55 · 3 answers · asked by Sliceathroat 3

In the back of my book we have extra problems we can do, to work prepart ourselves for the test. It gives answers, but no explanations. There were a few I didn't understand, so my chem teacher was supposed to help me during lunch. He was absent today (we have a block schedule, so we'll still have the test)! Anyway, I need help solving these equations. Any help would be great!

1) The concentration of a H2O2 solution can by determine by titration against a standardized potassium permanganate solution in an acidic medium according to the following equation:
2MnO4- + 5H2O2 + 6H+ --> 5O2 + 2Mn2+ + 8H2O
If 36.44mL of a 0.01625M KMnO4 solution are required to completely oxidize 25.00mL of a H2O2 solution, calculate the molarity of the H2O2 solution.

2) H2C2O4 is present in many plants and vegetables. If 24.0mL of 0.0100 M KMnO2 solution is needed to titrate 1.00g of a sample of H2C2O4 to the equivalence point, what is the percent mass of H2C2O4 in the sample?

2006-11-29 11:11:24 · 2 answers · asked by countrygurl587 3

can someone help me with balancing equations? i don't get how to do it at all, and i need help.

2006-11-29 11:09:18 · 5 answers · asked by Anonymous

Which metal is the cathode?
Al
Ni

2006-11-29 11:04:51 · 1 answers · asked by diana t 1

2006-11-29 11:04:35 · 3 answers · asked by tabachingching39 1

Cell potential
Calculate the standard cell potential given the following standard reduction potentials
Al^3+ +3e^- === Al; E^= -1.66V
Ag^+ +e^-=== Ag; E^= +0.799V looking for E^ cel
solve in V

2006-11-29 10:59:48 · 1 answers · asked by diana t 1

Is there any way to make any of the alkali metals with a science experiment. If so please tell me. Its for a chem 2 class at my high school.

2006-11-29 10:49:01 · 1 answers · asked by SCIENCE MAN 1

I need to know the molarity so that I can dilute it to make a 1% solution. Someone else made this solution and there is no other information on the bottle except that it is a 1N solution of AgNO3. I don't know how many grams of solid AgNO3 was added to an unknown amount of water. AgNO3's MW is 169.87.

2006-11-29 10:47:22 · 2 answers · asked by Anonymous

1. Suppose you stir sugar into ice water. Some sugar remains on the bottom of the glass. After the glass sits out for an hour, you stir it again. what will happen?
please....

the next question?

Suppose that you have 1 L of an acid solution with a pH of 2. you add 1L of pure water. What happens to the pH of the solution? explain...

please....

2006-11-29 10:40:25 · 5 answers · asked by hey 3

Is conductivity of a metal greater when it is heated, room temperature, or cooled. Can you rank them from greatest conductivity to least. The two metals i am testing is zinc and copper

2006-11-29 10:21:39 · 2 answers · asked by Anonymous

2006-11-29 10:08:34 · 6 answers · asked by leothelionator 2