Chemistry - November 2006

2006-11-27 02:09:47 · 1 answers · asked by lisa s 2

2006-11-27 01:52:47 · 7 answers · asked by adi 1

2006-11-27 01:48:27 · 1 answers · asked by Karen J 1

I just finished my degree in Chemistry and I havent a clue what area of chemistry to go into. I like variation, and the thought of being in the lab day after day does not appeal to me. Id like to get to work outside perhaps too if that were possible, and work independently. Do you know of, or work youself in an field of chemistry that would be suitable to me???

2006-11-27 01:15:35 · 20 answers · asked by Sadbh 3

Can somebody help please, and can you possibly not copy and paste cuz I have a project on it this friday? Please help!!!! Thank you guys!!!!!! =)

2006-11-27 00:24:27 · 3 answers · asked by . 6

2006-11-27 00:04:40 · 5 answers · asked by jwstinson@sbcglobal.net 1

2006-11-26 23:21:40 · 2 answers · asked by lovely 1

i need to find the concentration of a X in nmol/ml, i know i have to use v1x c1 = v2x c2 but not sure about my v1 which is 150 micromoles (um) do i habe to convert the micromoles? if so how?

2006-11-26 22:57:35 · 2 answers · asked by may 1

all help appreciated!

2006-11-26 22:41:06 · 2 answers · asked by Inquisitive 3

2006-11-26 22:36:53 · 16 answers · asked by badmaneskimo 1

I need an image of the orbits with the electrones inside
thanks.

2006-11-26 22:28:17 · 2 answers · asked by pianitta 2

2006-11-26 22:02:12 · 6 answers · asked by jack n 2

which i can get an info and separate wether it is used for colouring, preserving, or others??

2006-11-26 22:01:05 · 4 answers · asked by jessica m 1

which of the following overlap to form a sigma bond? pi bond? no bond? x-axis is the internuclear axis, or the line joining the nuclei of the two atoms.


1s and 2 s

1s and 2px

2px and 2py

3py and 3py

2px and 2px

2006-11-26 20:02:47 · 4 answers · asked by Anonymous

2006-11-26 18:58:08 · 4 answers · asked by naishadh d 1

A calibration curve for absorbance versus concentration of Copper (Cu^2+) was prepared and the equation of the line was found to be y=50.1x.

A) If the absorbance of an unknown copper solution was found to be 0.150, what is the concentration of the unknown?

B) If the mass used to make that unknown from above was 1.03g and it was made in a 100mL volumetric flask, what is the % copper in that unknown solution?

2006-11-26 18:47:45 · 1 answers · asked by Anonymous

2006-11-26 18:44:46 · 6 answers · asked by marrianne d 1

We had a quiz on Calorimetry, I wasn't sure if my balanced equation was correct. My balanced equation was 2AgNO3 + Cu -> Cu(NO3)2 + 2Ag. Is this correct? Or should I have written AgNO3+ Cu -> CuNO3 + Ag? PLS HELP ME!!! I realy do not know what oxidation no. of Cu to use (+1 or +2) I hope you guys can help me on this...

2006-11-26 18:34:38 · 11 answers · asked by Jenny 2

A radio wave travels 186 000 miles per second. How many kilometers will the wave travel in one microsecond? (1 mile= 1.61 km)

2006-11-26 18:00:43 · 3 answers · asked by soled fresh * 2

If so...how many recorded cases are there of it?

2006-11-26 17:24:22 · 6 answers · asked by Anonymous

2006-11-26 17:00:48 · 3 answers · asked by da russian mafia 1

2006-11-26 16:52:07 · 4 answers · asked by da russian mafia 1

'A' is an element in Group 2 and 'B' is an element in Group IV. Which of the following is the formula of the compund formed between A, B and Oxygen?

A. ABO
B. AB(small 2 below B)O i.e AB2O
C. A2BO
D. ABO3

2006-11-26 16:51:20 · 2 answers · asked by prashmanic 4

742 mmHg and a temperature of 25.0 degrees C?

a) 2.24 mol
b) 2.67 mol
c) 2.81 mol
d) 31.9 mol
e) 1.71 x 10(^3) mol

2006-11-26 16:45:12 · 2 answers · asked by Anonymous

Can you please help me determine the charge of the iron ion that exists in FeCl3? HOW to do it would be great.

2006-11-26 16:33:34 · 7 answers · asked by Mikey 2

Elemental ananalysis of a compound results in the following data

40.00 % C

6.71 % H

53.28 % O


1.80 g of the compound fills a 189.0 ml bottle with a pressure of 2931.6 mm Hg at a temperature of 23.0oC.

2006-11-26 16:26:23 · 4 answers · asked by Demaurey D 1

VAPOR PRESSURE OF SOLUTIONS
A. 10.0 g sample of the solid sucrose ( sugar, C12H22O11) was dissolved in 200.0 g of water. What will the vapor pressure of this solution be at 25C, if the normal vapor pressure of pure water at 25C is 23.8 torr?

B. Predict the vapor pressure of a solution prepared by dissolving 49.4 g of solid calcium chloride, CaCl, in150 g of water at 25C. The vapor pressure of water at 25C is 23.8 torr.


FREEZING POINT DEPRESSION/BOILING POINT ELEVATION OF SOLUTIONS
A. The freezing point of pure liquid benzene, C6H6, is 5.48 C. when 20.0 g of an unknown compound is dissolved in 500.0 g of benzene, the freezing poioint of the resulting solution is 3.77 C. what is the molecular weight of the unknown compount if Kf / (benzene) = 5.12 C. kg/mol?

B. What is the normal boiling point of a solution prepared by dissolving 54.6 grams of potassium chloride, KCl, in 400 mL of water (d = 0.997 g/mL, Kb= 0.51 C kg/mol)?

step by step process please. thanks

2006-11-26 16:22:11 · 1 answers · asked by vtxcuddlixgrl 1

LiOH + CO2 → Li2CO3 + H2O







If the percent yield of the above reaction is found to be 91.72 %, how many grams of H2O are produced from the complete reaction of 119.75 g of LiOH ?

2006-11-26 15:24:12 · 3 answers · asked by Christie 1

For the reaction LiOH +CO2→Li2CO3+H2O how many moles of Li2CO3 are produced from the complete reaction of 5.40 moles of LiOH

2006-11-26 15:22:26 · 2 answers · asked by Demaurey D 1

2006-11-26 14:50:30 · 2 answers · asked by alliphant 2