Chemistry - May 2007

2007-05-25 07:51:46 · 2 answers · asked by Lucy 2

2007-05-25 07:39:45 · 4 answers · asked by Anonymous

Can someone tell me how to solve this problem please?

2 KMnO4+16 HCL ---> 2 MnCl2+ 2 KCL+ 5 Cl2 + 8 H20

2007-05-25 07:38:22 · 2 answers · asked by FlyingNutSquirrel 2

A 250.ml volmetric flask contains 7.36g of potassium dichromate and dissolved water up to the calibration mark.

a) Determine the concentration of the solution.

b) Write a dissociation equation for the solution and inficae the concentraton of the cation and anion

2007-05-25 07:36:18 · 4 answers · asked by Anonymous

I'm working on a chemistry experiment that can be performed in a high school lab

2007-05-25 07:13:58 · 3 answers · asked by paris b 1

It is found that 7.24 kJ of heat is required to vaporize 21.5 grams of liquid hexane, C6H14. Calculate the heat of vaporization of hexane in kJ/mol.

2007-05-25 07:09:20 · 4 answers · asked by aimeikins711 1

Can someone please detail some applications used to get oil out of the ground and explain what happens to it when it does?

2007-05-25 07:08:05 · 7 answers · asked by Anonymous

2007-05-25 07:01:33 · 3 answers · asked by Anonymous

thank you so much

2007-05-25 06:57:23 · 3 answers · asked by sylvia 1

How many grams of sodium chloride could be produced from the reaction of 10.5g of sodium with 18.6L of chlorine

2007-05-25 06:42:18 · 2 answers · asked by Anonymous

2007-05-25 06:41:29 · 4 answers · asked by Frequent Rider 3

what hapens when:
-the functional group changes postion
-chain length increases
etc

what is the relationship between bond enthalpy ,bond lenght,and bond strength

2007-05-25 06:40:29 · 1 answers · asked by pumakelmusa 2

Since all the atoms are linked to nitrogen in their respective bonds,the polarity could be arranged based on the polarity of other atoms as followed:

N-F > N-O > N-S > N-P > N-C

please help in arranging in the order of decreasing polarity

2007-05-25 06:40:25 · 1 answers · asked by 41 1

2007-05-25 06:14:44 · 5 answers · asked by Anonymous

i'm doing organic chemistry at university level, and i've been assigned the task of stating the deferences between the two. i'd greatly appreciate help on this matter.

2007-05-25 06:09:22 · 11 answers · asked by Anonymous

Does anyone know of any detailed informations of transition lenses works and made? The materials and how it works?? would be greatful if anyone could share their knowledge with me.. V. much thanks

2007-05-25 05:56:40 · 1 answers · asked by Andy C 2

2007-05-25 05:43:11 · 4 answers · asked by Anonymous

As in, a bathtub. I'm thinkin' not, but I don't remember much from my high school chem class. Cheers!

PS: Need to know for story.

2007-05-25 05:15:20 · 6 answers · asked by I Heart Dead Things 3

I need help understanding the process of UV degradation & photo oxidation on an organic polymer (both alkyd & acrylic paint films more specifically). Just how does UV light lead to bond scission and cleavage on benzene rings and or its substituents?

2007-05-25 04:52:12 · 1 answers · asked by taulmachof 1

2007-05-25 04:50:11 · 21 answers · asked by David B 1

2007-05-25 04:49:08 · 9 answers · asked by David B 1

Is that right?
Also, from smallest to largest does it go- atom, element, molecule? Am I missing something?


Thank you in advance, I am really wishing I had paid more attention in high school.

2007-05-25 04:13:48 · 4 answers · asked by Anonymous

How did you think the A2 chemistry practical went today, you know titration wit hstrach indicator, then pH curves, the nrecrystallisation... tell me your thoughts please

2007-05-25 03:02:13 · 6 answers · asked by Anonymous

It seems like there is more going on then simple dillution. I know coffee is acidic pH 5.0, that might have something to do with it.

2007-05-25 01:57:27 · 3 answers · asked by Jeep S 1

2007-05-25 01:44:30 · 4 answers · asked by k,b 1

2007-05-24 22:58:39 · 1 answers · asked by Anonymous

2007-05-24 22:37:28 · 1 answers · asked by Serli N 1

2007-05-24 19:05:01 · 3 answers · asked by lisamarchand 1

a. solid
b. gas
c. all three phases
d. liquid

2007-05-24 18:06:35 · 5 answers · asked by christopher239938 1

2007-05-24 18:01:10 · 3 answers · asked by Anonymous