Chemistry - December 2006

this is the acid storage sludge. how can we make it dry.

2006-12-28 17:44:16 · 2 answers · asked by senthikumaran.p 1

2006-12-28 17:43:58 · 2 answers · asked by Anonymous

what is the relation of Donnan effect to osmotic pressure, on capillary and on ph?

what is the significance of the Donnan equilibrium to the biological system ?

what is the color of phenolphthalein, bromphenl ble, and phenol red in acidic and in base media?

2006-12-28 17:38:28 · 1 answers · asked by cuteangel 1

i can't seem to find any household products i have at home that include either..
calcium sulfate or sodium silicate.
i asked a similar question on yahoo before, and that helped a lot..but i realize, i don't have any products at home with these ingredients...
i thought baking powder had calcium sulfate, but uh, it said something like calcium bicarbonate instead? something like that.
and as for the sodium silicate...i don't eat preserved eggs, and so..i don't think i have anything at home with it...
can anyone suggest any household products that may include either calcium sulfate or sodium silicate in their ingredients? heh, thank youu.

2006-12-28 17:16:46 · 3 answers · asked by lilazngoddess213 1

i'm about to use the beer lambert's law for the equation Fe3+ + SCN- <==> [FeSCN]2+. i already have the absorbance and pathlength. we are asked to get the concentration but then i dont know how to get the molar absorptivity. please help!

2006-12-28 17:05:31 · 3 answers · asked by b3rna_velayo 1

A compound is composed of element X and hydrogen. There is 80% X by mass, but there are 3 times of hydrogen atoms as X atoms per molecule. Determine element X.

So it's asking for element X, where there are 3 hydrogen molecule per X, but X still makes up 80%. Is it possible?

2006-12-28 17:00:06 · 4 answers · asked by Anonymous

For example, the smell of lilacs can be copied chemically, and will be similar to the real thing (though not perfect). But how do they get the "code" of the lilac's smell? What's the "DNA" of a fragrance (as an analogy)?

2006-12-28 16:55:00 · 3 answers · asked by Anonymous

2006-12-28 16:03:40 · 19 answers · asked by Anonymous

If the reaction is: Solutions of iron (III) chloride and tin(II) chloride are mixed...what would the final net ionic equation be? Aren't the products and reactants the same...so wouldn't the oxidation numbers be the same? ahhh...i'm confused.

2006-12-28 15:56:00 · 3 answers · asked by Anonymous

i want to know any chemicals useful distroy a stone

2006-12-28 15:24:47 · 8 answers · asked by Anonymous

On heating 5.03 g of hydrated barium chloride, 4.23 g is left behind. What is the name of this hydrate?

2006-12-28 15:20:59 · 2 answers · asked by pandalover 1

can you please explain...pH in water and soil, pH in general, and bases and acids?
this is for an exit project and i really don't comprehend the general idea behind the whole thing. I have research that i don't understand or can't make into my own words....please help me!
oh, and you can choose to just help me with one part, but i just really need help!
thank you SO MUCH!!!

2006-12-28 15:14:37 · 9 answers · asked by alex wolfgang black 2

it may not actually be possible but I'm curious

2006-12-28 15:13:25 · 2 answers · asked by Anonymous

2006-12-28 15:08:05 · 4 answers · asked by Steenskees 2

Complete the word equation
Then write the balanced equation.
27. calcium + oxygen >>>>
28. copper(II) carbonate>>>>
29. aluminum + hydrochloric acid >>>>
30. potassium iodide + chlorine >>>>
31. barium chloride + sodium sulfate >>>>
32. copper + silver nitrate >>>> copper(II) nitrate +
33. barium hydroxide + sulfuric acid>>>>
34. zinc sulfate + ammonium sulfide>>>>
35. sodium + water >>>>
36. magnesium + sulfuric acid >>>>
37. Mercury(II) oxide >>>>

2006-12-28 14:53:08 · 1 answers · asked by truckin_90 2

In a project, I have to prepare zinc stock solution with pH 4,5 n 6. But then my supervisor said that I have to use buffer instead of just adding NaOH and HCl. So, how can I prepare buffer?

2006-12-28 14:52:46 · 2 answers · asked by L*ime 1

I got stuck on one problem and it's about the melting points of the Alkali Metals. I have to explain why the melting point of alkali metal decrease down the group: Li to Cs. The book said that the bigger the molecule is, the higher the London dispersion, therefore resulting in higher intermolecular forces, finally to higher melting point. But then Alkali metal is opposite of what the book said... Why is that? I don't know how to answer it, please help me! (I already posted another question regarding this but I guess I worded the question weird, so I am posting another question.) Thank you!

2006-12-28 14:31:40 · 4 answers · asked by ljh9092 1

What is the expected molecular weights of non-reduced and reduced IgG and the reason
for this relating to the heavy and light chains?

The Expected Molecular weight obtained from SDS-PAGE.
using 7.5% gel for non-reduced sample and 12.5% gel for reduced sample

2006-12-28 14:00:14 · 1 answers · asked by BrInGiToN 2

2006-12-28 13:42:30 · 10 answers · asked by caligurl 2

Come up with a tagline/slogan for the element lithium. The slogan should be one short sentence and concentrate on a quality/property of lithium. The best slogan gets best answer.

2006-12-28 13:22:04 · 3 answers · asked by Mike C 2

2006-12-28 12:58:09 · 0 answers · asked by Stephanie C 1

I'm doing a science experiment and need hydrochloric acid and sulfuric acid. Do you know where I can buy them, or how I can make it?

2006-12-28 12:40:17 · 6 answers · asked by Anonymous

Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure copper coin weighing 12.0g?

2006-12-28 11:45:32 · 3 answers · asked by arreis08 1

Like right when you strike it.

2006-12-28 11:20:02 · 5 answers · asked by ChooseRealityPLEASE 6

2006-12-28 10:51:20 · 4 answers · asked by Paige W 1

The specific heat of water is 4.184 J/g*C degree. How much heat is required ot raise the temperature of 5.0 g of water by 3.0 C

A 21.0g sample of water is cooled from 34.0 degree celcius to 28 degree celcius. How many jouoles of heeat were removed from teh water.

I have no idea how to do this so could someone help me out

2006-12-28 10:41:51 · 3 answers · asked by silentcargo 3

I am a magican, working on a new trick and will need to dissolve some tissue paper as part of the trick. I need a safe chemical that can be held in my hand that will make the tissue paper dissolve.

2006-12-28 09:53:41 · 3 answers · asked by tg 1

2006-12-28 09:39:29 · 8 answers · asked by arreis08 1

2006-12-28 09:33:57 · 10 answers · asked by kelly w 1

Can someone explain to me why this is the order of increasing boiling points. I also don't get why glycerine and KBr have the same boiling points.
0.030 m phenol (C6H5OH) < 0.040 m glycerine = 0.020 m KBr


Adrenaline is the hormone that triggeres release of extra glucose molecules in times of stress or emergency. A solution of 0.64 g of adrenaline in 36.0 g of CCl4 causes an elevation of 0.49 C in the boiling point. What is the molar mass of adrenaline?

Can someone help me check if the answer is correct.
For this question I got 182 g/mol.
I found the molality = (0.49)/(5.02) = 0.0976 m
I found the mole = (0.0360)(0.0976) = 0.00351 mol
I found molar mass = (0.64)/(0.00351) = 182 g/mol

2006-12-28 09:29:32 · 2 answers · asked by Rain 2