Chemistry - November 2006

2006-11-14 22:24:27 · 12 answers · asked by Anonymous

2006-11-14 22:01:49 · 2 answers · asked by queen 1

Isn't it just 1 mole of O and 2 moles of H?

2006-11-14 20:28:22 · 6 answers · asked by bebeeangeldust 4

Is it because only polyatomic ions and binary molecular binary compounds use di?

2006-11-14 20:00:53 · 4 answers · asked by bebeeangeldust 4

2006-11-14 19:47:47 · 15 answers · asked by bablu 1

2006-11-14 16:01:53 · 7 answers · asked by chad w 1

we did an experiment where we found the % of water in a hydrate BaCl2.2H20. by doing mass of H20 lost divided by Mass of Bacl.2H20 times 100. Why is this method unsuitable for other hydrates, and we used crucibles for the experiment but we had to measure the crucible exactly after it cooled not later y is dat??

2006-11-14 14:45:50 · 2 answers · asked by Preeya 5

In recovery of gold, the raw material is typically treated with mercury, which forms an amalgam with the gold. What is the actual process of "forming an amalgam". Does this happen only between gold and mercury?

2006-11-14 14:45:01 · 2 answers · asked by smokey 1

2006-11-14 14:42:13 · 1 answers · asked by cheese 2

Which one of these is a liquid?
ice, gold, helium, or iron

2006-11-14 14:33:43 · 8 answers · asked by lover. 1

The solubility of calcium arsenate (Ca3(AsO4)2, molar mass = 398.078 g) in water is measured to be 0.034 g/L. What is Ksp for this salt?

2006-11-14 14:20:27 · 1 answers · asked by Anonymous

I do not understand chemistry and I want to know the difference in lone pairs and bonds and how each repel other atoms. Such as if water's two lone pairs were changed into bonds, what would the geometric shape be?
Placing atoms in places also confuses me, like does it matter where the Cl atoms are put in the dichloromethane (CH2Cl2) in the geometric or lewis structure (if the Cl's could be opposite or adjacent to each other). And since it is already filling it's all 8 electron shells, is the CH2Cl2 already non-polar? Or is it still polar?

2006-11-14 14:15:00 · 3 answers · asked by Anonymous

thanks

2006-11-14 14:05:45 · 3 answers · asked by Michelle 4

Hi, I had a lab today where we find constant using Titration curve, im not sure how to do that last part.

My average of volumes, for pH 7 = 6.97. I think I devide this by 2 to get the half equivalence point, which would be 3.49mL at that my pOH was 4.51,

I was titrating 10mL of unknown acid with .1000M NaOH

the equation I use is pOH = pKb + log [conjugate acid]/[base]

Im not quite sure what to do from there, I dont know how to get the conjugate acid, and what is the base .1000 because thats what its molarity is? Do I plug 4.51 into the pOH and then devide log conju acid/base by 4.51 to get pKb, is pKb the dissociation constant?

Any help or infomation would be appreciated.

2006-11-14 13:56:58 · 1 answers · asked by axcryingxshame 1

How come only 95% ethanol can be distilled and not 100% ethanol

2006-11-14 13:51:26 · 2 answers · asked by bbap 1

what is the importance of an increase or decrease in atomic radius?

2006-11-14 13:50:47 · 2 answers · asked by shelthefox 4

2006-11-14 13:14:14 · 3 answers · asked by sia 1

okay Im not quite sure how to get the Dissociation constant. I have the rest of the values though.

I have 7.00 ml for the first derivative, 6.93ml for the 2nd. It then asks for the average which is 6.97ml

And then it asks for the molarity which is .100M We titrated a unknown acid with .100 NaOH

I have pOH = pKb + log [conjugate acid]/[base]

Im not sure which volume I would use to get the pOH because for some reason the lab instructor told this other guy to devide his average vol by 2 and use that volume to get the pH at that volume. And then plug that into the equation.

Im also not sure which values to use at conjugate acid and base

So can anyone help?

2006-11-14 13:11:12 · 2 answers · asked by axcryingxshame 1

2006-11-14 13:09:49 · 3 answers · asked by curious 2

1) unsaturated solution
2) saturated solution
3)supersaturated solution?

2006-11-14 13:06:17 · 3 answers · asked by foxy lady 2

2006-11-14 12:52:49 · 3 answers · asked by Anonymous

The alcohol in 'gasohol' burns according to the following equation:
C2H5OH(l) + 3O2(g) --> 2CO2(g) + 3H2O(l)
If the combustion reaction consumes 33.1 grams C2H5OH reacting with excess O2, how many moles of H2O are formed?

2006-11-14 12:49:37 · 4 answers · asked by nglennie_06 1

2006-11-14 12:46:14 · 2 answers · asked by yahoo addict 1

What is the order of sublevels when dealing with electrons? I know it goes 1s, 2s, 2p, then what?

2006-11-14 12:46:11 · 3 answers · asked by Michael Skarn 3

name the compound of N2O2 and correct other formula and name it as well???????????


thanxxxxxxxxxxxxxxxxxxxxxxxxxxx

2006-11-14 12:40:42 · 5 answers · asked by Anonymous

Does anybody know the # of atoms in one mole for neon or and # of grams in one mole?

2006-11-14 12:36:15 · 5 answers · asked by cowboysblow27 3

can some one with some knowledge of these elements just tell some facts about it doesnt really need to be long because my school textbook doesnt really go over these elements

2006-11-14 12:31:09 · 4 answers · asked by ? 2

39.Predict the product for the following reaction:

NaI(s) + Pb(NO3)2(s)  _______

a.NaNO3(aq) + PbI(s)
b.Na(NO3)2(aq)+ PbI2(s)
c.Na3(NO3)2(aq) + PbI(s)
d.NaNO3(aq) + PbI2(s)

40.What type of reaction would have occurred in the previous question?

a. combustion
b. formation
c. single replacement
d. double replacement

2006-11-14 12:28:53 · 3 answers · asked by Anonymous

2006-11-14 12:27:35 · 2 answers · asked by Anonymous

35.Predict the products for the following reaction:

CH4(g) + O2(g)  ________

a. CH4O2(g)
b. CH2O(g)
c. CHOH(g)
d. CO2(g) + H2O(g)

36.What type of reaction would have occurred in the previous question?

a.combustion
b.formation
c.single replacement
d.double replacement

2006-11-14 12:18:47 · 2 answers · asked by Anonymous