Chemistry - March 2007

how does nuclear fusion create electricity?
and what is it exactly?

2007-03-21 07:56:32 · 4 answers · asked by Anonymous

2007-03-21 07:55:43 · 1 answers · asked by elchebib 1

at the same temprature. and pressure effuses in 2.42 minutes. what is the moral mass of the unknown gas?

2007-03-21 07:48:07 · 1 answers · asked by unknown 1

i have been having real trouble with this and i have test upcoming. I know the molecular weight of sodium hydroxide is 40 amu but I'm just lost on how to do it. Can someone show me how to do it with detailed work? I'd love that!

2007-03-21 07:41:02 · 3 answers · asked by Anonymous

List the two ways reduction is represented in organic chemistry

2007-03-21 07:39:50 · 2 answers · asked by Anonymous

how many grams of oxygen are produced in the decomposition of 5g of potassium chlorate???

i dont kno how to get that into the equation,,,, and then balance it... if u can please give it 2 me and explain how to solve it cuz im not sure if its how i think it is...

2007-03-21 07:39:27 · 2 answers · asked by xxlore09xx 1

The percentage composition of a compound is 92.3% C and 7.7% H. If the molecular mass is 78 u, what is the molecular formula?


Find the formulas for the hydrates with the following analysis.

a.) 5.262 g Tl(NO3)3 and 0.728 g H2O
b.) 2.94 g Sn(NO3)2 and 4.37 g H2O
c.) 8.351 g UO2(HCOO)2 and 0.421 g H2O
d.) 17.02 g UO2HPO4 and 3.42 g H2O

Name each of the following hydrates.
a.) MgSO4.H2O
b.) Mn(NO3)2.4H2O
c.) CaCrO4.2H2O
d.) Na2SO4.10H2O

2007-03-21 07:39:11 · 3 answers · asked by Anonymous

Can someone write this reaction:

methyl alcohol + chlorosulfonic acid -----> methyl sulfate

2007-03-21 07:39:05 · 1 answers · asked by Anonymous

2007-03-21 07:38:26 · 2 answers · asked by TheGreatest 3

2007-03-21 07:37:45 · 4 answers · asked by blah 3

Ok we have:
* 10g of Hg(NO3)2 in 1000g of water (freezing point=-0.162 °C)
* 10g of HgCl2 in 1000g of water (freezing point=-0.0685°C)

With this information, I have to determine which is the strongest electrolyte.

***Please tell me if I'm doing it right***: because both have similar molalities, I calculated the van 't hoff factor (i) in both solutions.
i Hg(NO3)2 = 2.84 (ideally 3 with complete dissociation)
i HgCl2 = 1.00 (ideally 3 with complete dissociation)

So I came to the conclusion that Hg(NO3)2 was the strongest electrolyte because it was the one that produced more total particles and it was the closest one to the ideality.
Am I right or completely wrong? Thanks

2007-03-21 07:29:03 · 1 answers · asked by robert 2

2007-03-21 07:13:06 · 4 answers · asked by unknown 1

which one of the following metals is the poorest conductor of electricity?
a) tin
b) zinc
c) lead
d) aluminum

2007-03-21 06:55:11 · 1 answers · asked by Lynn D 1

call me dumb. but I never knew that they collect urine at cinemas and I didn't realized, urines can be that useful'.

2007-03-21 06:47:29 · 3 answers · asked by randomX1 3

Ethylamine (C2H5NH2) has a pKb= 3.53. Determine the pKa of its conjugate acid (C2H5NH3+) if pKw=13.6

2007-03-21 06:41:19 · 1 answers · asked by Anonymous

2007-03-21 06:40:07 · 3 answers · asked by watford_boy21 1

KHC8H4O4(aq)+NaOH(aq) --> NaKC8H4O4(aq)+H2O(l)
*HC8H4O4 is a weak acid

2007-03-21 06:12:01 · 3 answers · asked by mj58 2

Can someone help me understand how to set up this equation?
Calculate the volume of methane that must decompse to produce 10.0 liters of hydrogen. If the two gases are compared at the same temp and pressure.
CH4(g)----->C(s)+2H2(g)

2007-03-21 06:01:25 · 3 answers · asked by Toothie 2

Is the air resistance greater than the friction or is the friction greaterthan the air resisitance or are they balanced. plz help!!!

2007-03-21 06:00:25 · 5 answers · asked by nothing 1

Is upthrust greater than gravity or is gravity greater than upthrust or are they balanced. plz help!!!

2007-03-21 05:58:57 · 5 answers · asked by nothing 1

scientific anwser only plz!!!

2007-03-21 05:54:54 · 7 answers · asked by nothing 1

2007-03-21 05:53:53 · 7 answers · asked by nothing 1

made by combining
0.500 L of 0.380 M HC3H5O2 ( Ka = 1.30 x 10-5 )
and 0.500 L of 0.380 M NaC3H5O2

An explanation on how the answer was derived would be greatly appreciated!!

2007-03-21 05:48:45 · 1 answers · asked by Anonymous

I reacted HCl, H2SO4 and H3PO4 with zinc and I found the activations energy to be 30.1, 20.3 and 30.9 KJmol-1.
I don't really care if the values are accurate but I have been trying to find an explanation for the trend, something that I can justify numerically... do you think any of the following can have an effect of activation energy?
a. Ka values (for polyprotic Ka = Ka1*Ka2*...)
b. bond strenghts of H-Cl, H-O(-S), H-O(-P)
c. How easily the rest of "non dissociated" molecules of acid dissociate and the rate at which they do
d. ???

I really need help, been stuck on this problem for a couple of days.... does this trend even make sense?
Thanks a lot

2007-03-21 05:07:14 · 1 answers · asked by Lara M. 3

2007-03-21 04:49:10 · 17 answers · asked by Nguyen Tran Ngoc T 1

Do vitamins lose their qualities if exposed to high temperature and what is the highest temperature in which they still preserve their quality? And do they lose their qualities if mixed with vinegar?

2007-03-21 04:46:56 · 1 answers · asked by Victory 4

acetone has a normal boiling point of 329.4 K and molar heat of vaporization of 30.25 kJ/mole.

2007-03-21 04:36:49 · 1 answers · asked by piangpiang 2

what would the volume be at 8 degrees assuming constant pressure

2007-03-21 04:27:44 · 7 answers · asked by CoNfUsEd 2

2007-03-21 04:25:02 · 1 answers · asked by rrrr t 1

calculate it's volume when under pressure of 750mm Hg

2007-03-21 04:19:41 · 8 answers · asked by CoNfUsEd 2