Natural Science Forum / Chemistry / General Chemistry / April 2006

It's been many decades since I've had to apply any of the principles of
chemistry I once knew. I need to learn and understand again the basics
of using phenolphthalein to affect a simple but dramatically visible
(and preferably a reversible and repeatable event if possible) and have

For a science lab, I am asked to find the following:
What factor(s) affect percent yield in a reaction which produces
calcium carbonate?

I got a demand to finish a model with polyester.
To have a better idea about the finish here is link of a picture of a
chair with the required finish:
http://www.metric-in.com/img/chair_detail.jpg

I have to calculate the quantity of heat to be removed from a gas
mixture (2 components) necessary to decrease its temperature from say
100 to 80 °C.
Somebody can suggest me the necessary steps to do it?

What's the best Quantum Chemistry textbook available with good
clarity. Do you still recommend those written ages ago by Linus
Pauling?
Thanks.

$$             Tony Fleming writes FLUFFY (Bilge):

$$                 GR autopsy & silent p coup.

This was an interesting episode as far as Nova's go.
Nova: Dimming the Sun
 http://www.pbs.org/wgbh/nova/sun/about.html
They claimed sunlight, not ambient temperature,

I'm about to start Organic chemistry on my own. Can someone please tell
which one would be a better book - LG Wade or Solomons. I'm convinced
that I'll be doing one of these.

Say for instance I have two liquids: a vegetable oil with viscosity of
70 cp, and diesel fuel of viscosity 3 cp.
If I mix them 50:50 by mole fraction, somehow I get a feeling that the
viscosity will not be just the arithmetic average of the two (36.5 cp).

how oils both edible and nonedible  cab be cured.

I though i made a 80% and 40% aqueous phenol solution (newly opened
solid phenol with 18.2 Mohm water). The former is colorless while the
latter is whittish which partitions into two layers upon standing. Does
this sound right or did i screw up?

Goodmorning to everybody,
I've been trying to figure out an alternative to the usage of active
chlorine as sterilizing agent for seawater used in heat exchangers. In
practice, chlorine is added to seawater before it enters in the

HI - I am, being a little accurate here, a below-average student in
science. And just bumped into this staggeringly difficult question on
the web (preparing for GCSE exams). So a question - if anyone out there
can help me solve this, I would greatly appreciate it.

See discussion started in
http://www.physorg.com/news.php?newsid=6148
Pentcho Valev

please help me
i need to know in detail the impact of dew point on different types of
natural gas meters i.e. diaphragm, rotary, orifice and ultrasonic etc.
what will be the behaviour of these meters in dew and what to do to