Natural Science Forum / Chemistry / General Chemistry / January 2007

"Dumbledore_" <Headmaster@hogwarts.physics_q> wrote in message news:...
"Uncle Al" <UncleAl0@hate.spam.net> wrote in message news:45BF5AEE.99ABFC7@hate.spam.net...

Silicone polymers were once found in car wax, as lubricants, water
repellants etc. I wanted to buy some silicone oil in the local hardware
store, but found only products marked as 'Silicone-free', 'Contains 0%
Silicone' and 'Silicone remover'. So what's wrong with it? Is there

Hello!  I wanted to take a quick poll regarding where you work (City,
State or Country if outside of the US) and what your job title is.
I am about to graduate and will be looking for a job in Portland,
Oregon (in an environmental or analytical lab) so am especially

    Anyone know where I can find small quantities of powdered
nylon?  Can't find it at the usual chemical supply places.

I would like some idea of the amount of cooling that a water filled, air
cooled radiator can provide.  Or if someone could point me at a usable
resource on the subject, that would be great.  It's been over 20 years
since I had a heat transfer class.

I am doing a experiment with HF solution. I need to use pipette to
suck HF solution? But you know HF solution etches glass, anybody can
recommend a pipette for HF solution?
Thanks a lot!

Question:
If one were to have 4 parts ammonia (NH3) and 1 part hydrogen peroxide
(H2O2,) would the reaction, when mixed, be modelled by the equation
below?

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I bought some manganese oxide through a pottery-supplier for use in a
phosphating bath. But it's totally insoluble in acid, not even strong
hydrochloric acid seems to do much. What gives? Wich oxide can this be and
how do I dissolve it in phosphoric acid?

Question:
If one were to have 4 parts ammonia (NH3) and 1 part hydrogen peroxide
(H2O2,) would the reaction, when mixed, be modelled by the equation
below?

I am checking on the use of different aluminum-oxygen complexes as
water treatment chemicals.  I appear to have the choice of using
polyaluminum chloride (made by base hydrolysis of aluminum chloride)
or aluminum chlorohydrate (made by treating aluminum hydroxide with

How does CO2 production from ethanol and gasoline compare when the entire
cycle is considered, including ethanol and gasoline production and
combustion?

What is the purpose of a wick on an oil lamp?  I think that I know the
answer but I am uncertain.  I think that a wick allows for uptake of
the fuel.  I think that a wick is used to keep the flame in a single
area rather than dispersed over the area of the surface of lit fuel.  

Does an algorithm exist where one can categorize
molecular formulas such as:
  C10H10BrN3
  C10H10Cl2O2

A friend has 265 gallons of kerosene that was dumped into a tank that
used to have lecithin in it, and now he can't use it in his heater
because it gunks up the wick in short order.  I suggested water or
water/alcohol extraction to remove the lecithin and it helped a lot, but