Natural Science Forum / Chemistry / General Chemistry / June 2007

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i am have problem with my heat exchanger pipe
my place at asia pasific, and in my pipe silicate scale very-very make
trouble with my HE

............
hai
if i want to remove silicate scale with acid or base week
what must i do?

my grandpa told me that they had to wet the coal before they fired
them in the locomotion, because this would increase the efficency.
It is that at high temperatures water splits automatically and
the hydrogen and oxygen in the water become useful.

Question: Which orbital, 3p or 3d, gives an electron a greater
probability of being found close to the nucleus? I know that the
answer is 3p, but I don't know how I can explain this correctly. Can
you help me with that?

<re- and cross-posted to relevant NGs in hopes of receiving relevant
responses>
Hi:
I would like to make a bright intensely-monochromatic green-colored

If we two compounds present in a mixture have similar proton spectrums, but
different absorptions frequencies with their respective absorption peaks in
,say in a ratio of 3:1 ; would it be possible to determine the ratio of
isomers presence?

Anyone Else Using an Ocean Optics Spectrometer?  
I am experimenting with an Ocean Optics  USB4000;
Optics and electronics seem fine, but software is a nightmare !!!!
They sell  Spectrasuite, which is a nice interface just for very very

Hi all, coming from an electronics/engineering background so I
apologize if there's an easy answer to this, I haven't come across it
yet...
I'm interested in being able to sense/measure alcohol fermentations in

Looking for supplier of a coated lab vacuum oven for use with
corrosives such as hydrochloric acid. We isolate a number of compounds
from hydrochloric acid solution, but drying them in conventional
stainless steel vacuum ovens is rather hard on the oven. If a

What prompted this post is the business speculation-venture being
undertaken in Cairo ILL and Elk Point,
South Dakota where the debate is the idea of gasification of coal in
order to make diesel fuel. Alot of water

There have been four great loves in my life: Women,
children, Baseball, and Mathematics.  In the first two,
I have a plethora of varied and valuable experiences,  
In the latter two, I have both breadth and depth of

I don't know if this is the appropriate newsgroup for this enquiry;
if not I apologize, and would be glad to be referred to the right one(s).
I'm translating a sort of scientific movie ("What the BLEEP"), where there
is mention of peptide. My dictionary source suggests "pepsine" as ...

I want a complete list of basic physical chemistry formulas. I failed
to find it out in the net. Please help me. I need it urgently. Thanks
in anticipation.

Does any one know of natural processes of forming H2O molecule that
contribute significantly to the amount of water on this planet. I am
of the opinion that the amount of water since the formation of this
earth has not changed significantly. i.e. It only changes it state

How does one go about intializing flash calculations for hydrocarbon-
water+ systems given poor estimates? More specifically, I'm trying to
figure out given a particular mixture of species at a certain
temperature, at what pressure will this mixture become unstable and